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MW 2x4 / N38 - cylindrical magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: 1-6500
Rating: 5

cylindrical magnet

Catalog no 010055

GTIN/EAN: 5906301810544

5.00

Diameter Ø

2 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

0.09 g

Magnetization Direction

↑ axial

Load capacity

0.09 kg / 0.86 N

Magnetic Induction

597.70 mT / 5977 Gs

Coating

[NiCuNi] Nickel

technical specifications »

0.209 ZŁ with VAT / pcs + price for transport

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Physical properties - MW 2x4 / N38 - cylindrical magnet

Specification / characteristics - MW 2x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010055
GTIN/EAN	5906301810544
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
Diameter Ø	2 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	0.09 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.09 kg / 0.86 N
Magnetic Induction ~ ?	597.70 mT / 5977 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 2x4 / N38 - cylindrical magnet

properties	values	units
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
coercivity bHc ?	10.8-11.5	kOe
coercivity bHc ?	860-915	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	36-38	BH max MGOe
energy density [min. - max.] ?	287-303	BH max KJ/m
max. temperature ?	≤ 80	°C

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

properties	values	units
Vickers hardness	≥550	Hv
Density	≥7.4	g/cm³
Curie Temperature TC	312 - 380	°C
Curie Temperature TF	593 - 716	°F
Specific resistance	150	μΩ⋅cm
Bending strength	250	MPa
Compressive strength	1000~1100	MPa
Thermal expansion parallel (∥) to orientation (M)	(3-4) x 10^-6	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10^-6	°C^-1
Young's modulus	1.7 x 10⁴	kg/mm²

Engineering modeling of the assembly - report

The following data are the outcome of a engineering calculation. Results are based on models for the material Nd₂Fe₁₄B. Real-world performance may deviate from the simulation results. Use these data as a reference point when designing systems.

Table 1: Static pull force (pull vs gap) - characteristics
MW 2x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	5954 Gs 595.4 mT	0.09 kg / 90.0 g 0.9 N	safe
1 mm	1696 Gs 169.6 mT	0.01 kg / 7.3 g 0.1 N	safe
2 mm	570 Gs 57.0 mT	0.00 kg / 0.8 g 0.0 N	safe
3 mm	256 Gs 25.6 mT	0.00 kg / 0.2 g 0.0 N	safe
5 mm	82 Gs 8.2 mT	0.00 kg / 0.0 g 0.0 N	safe
10 mm	15 Gs 1.5 mT	0.00 kg / 0.0 g 0.0 N	safe
15 mm	5 Gs 0.5 mT	0.00 kg / 0.0 g 0.0 N	safe
20 mm	2 Gs 0.2 mT	0.00 kg / 0.0 g 0.0 N	safe
30 mm	1 Gs 0.1 mT	0.00 kg / 0.0 g 0.0 N	safe
50 mm	0 Gs 0.0 mT	0.00 kg / 0.0 g 0.0 N	safe

Grip strength drops drastically with every subsequent millimeter of distance. Remember that even a microscopic distance (e.g., dirt, paint, dust) strongly weakens the grip. Magnets work most effectively in perfect adhesion; distance kills the power. See how rapidly the pull force drop, when the product does not touch directly to the metal substrate. When planning the arrangement, avoid redundant distances.

Table 2: Vertical capacity (vertical surface)
MW 2x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.02 kg / 18.0 g 0.2 N
1 mm	Stal (~0.2)	0.00 kg / 2.0 g 0.0 N
2 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
3 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
5 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
10 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N

The following data defines the theoretical shear load sufficient to start the shifting of the magnet down on a vertical steel plate (considering standard friction coefficient). The holding force is relative to the separation distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - vertical pull
MW 2x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.03 kg / 27.0 g 0.3 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.02 kg / 18.0 g 0.2 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.01 kg / 9.0 g 0.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.05 kg / 45.0 g 0.4 N

When mounting a holder on a upright plane (e.g., a car body), it you can count on barely approx. 1/5 of its nominal power. Gravitational force and a weak degree of grip cause that magnets slip easier than they pop off the substrate. Planning a hanger? Consider that the shear force is significantly lower than the perpendicular breakaway force. On a slippery surface, the magnet will slide down under a much lighter load. Utilizing a rubberized layer can significantly raise the stability.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 2x4 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.01 kg / 9.0 g 0.1 N
1 mm	25%	0.02 kg / 22.5 g 0.2 N
2 mm	50%	0.05 kg / 45.0 g 0.4 N
5 mm	100%	0.09 kg / 90.0 g 0.9 N
10 mm	100%	0.09 kg / 90.0 g 0.9 N

A thin metal plate cannot absorb the full magnetic flux, which squanders power of the magnet. If you attach a powerful product to a weak sheet, the magnetism will pass right through and the attraction force will be weaker. To squeeze the maximum of this magnet's power, you require a sufficiently solid backing of steel. The material oversaturation means that on delicate walls (e.g., car bodies), the product holds weaker. We suggest choosing the steel dimension from these parameters.

Table 5: Working in heat (material behavior) - power drop
MW 2x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	0.09 kg / 90.0 g 0.9 N	OK
40 °C	-2.2%	0.09 kg / 88.0 g 0.9 N	OK
60 °C	-4.4%	0.09 kg / 86.0 g 0.8 N	OK
80 °C	-6.6%	0.08 kg / 84.1 g 0.8 N
100 °C	-28.8%	0.06 kg / 64.1 g 0.6 N

Standard neodymium magnets lose power above the temperature limit. Avoid high temperatures – excessive heat can permanently demagnetize this magnet. As the temperature rises, the neodymium's power momentarily decreases. Do not use this product close to ovens exceeding its operating temperature limit. Too high temperature will lead to irreversible degradation of magnetism.

*Technical advisory: Temperature resistance depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (pancake types) risk losing magnetic properties under lower heat stress than taller cylinders. The danger warning in the table signals permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 2x4 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	0.69 kg / 687 g 6.7 N 6 090 Gs	N/A
1 mm	0.21 kg / 208 g 2.0 N 6 559 Gs	0.19 kg / 187 g 1.8 N ~0 Gs
2 mm	0.06 kg / 56 g 0.5 N 3 391 Gs	0.05 kg / 50 g 0.5 N ~0 Gs
3 mm	0.02 kg / 17 g 0.2 N 1 883 Gs	0.02 kg / 15 g 0.2 N ~0 Gs
5 mm	0.00 kg / 3 g 0.0 N 743 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
10 mm	0.00 kg / 0 g 0.0 N 165 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
20 mm	0.00 kg / 0 g 0.0 N 30 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
50 mm	0.00 kg / 0 g 0.0 N 3 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two strong neodymiums attract each other from a wider radius than a magnet and steel combination. The connection of two magnets generates a stronger field and a larger range of action. Want to build a strong closure? Use a pair of magnets instead of one magnet and a striker plate. Remember that when bringing together two magnets, the impact force is extreme. The repulsion force is marginally weaker than the attraction, but still impressive.
*Flux density in repulsion mode is approximately ~0 Gs at the geometric center of the gap (due to field cancellation).

Table 7: Hazards (implants) - warnings
MW 2x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	2.0 cm
Hearing aid	10 Gs (1.0 mT)	1.5 cm
Timepiece	20 Gs (2.0 mT)	1.0 cm
Mobile device	40 Gs (4.0 mT)	1.0 cm
Car key	50 Gs (5.0 mT)	1.0 cm
Payment card	400 Gs (40.0 mT)	0.5 cm
HDD hard drive	600 Gs (60.0 mT)	0.5 cm

A strong magnetic field poses a serious hazard to electronics and pacemakers. These neodymiums generate a field that disrupts operation of digital equipment. Notice: the unseen radiation passes through tissues and plastic. Increased vigilance must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: mechanical watches, car keys, speakers, and displays. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - collision effects
MW 2x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	31.89 km/h (8.86 m/s)	0.00 J
30 mm	55.24 km/h (15.34 m/s)	0.01 J
50 mm	71.31 km/h (19.81 m/s)	0.02 J
100 mm	100.85 km/h (28.01 m/s)	0.04 J

Magnetic elements are prone to chipping – a strong collision with metal can result in shattering. Watch the impact speed – a neodymium left loose speeds with massive force. Kinetic force can cause material chips or dangerous crushing to fingers. Be sure to control the product during mounting so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Use safety goggles when handling with large magnets.

Table 9: Surface protection spec
MW 2x4 / N38

Technical parameter	Value / Description
Coating type	[NiCuNi] Nickel
Layer structure	Nickel - Copper - Nickel
Layer thickness	10-20 µm
Salt spray test (SST) ?	24 h
Recommended environment	Indoors only (dry)

Neodymium magnets are highly susceptible to corrosion without proper protection. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (P_c)
MW 2x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	209 Mx	2.1 µWb
P_c Coefficient	1.21	High (Stable)

Total magnetic flux passing through the pole surface. Key data for generator designers as well as sensors. P_c value defines the magnet's operating point.

Table 11: Physics of underwater searching
MW 2x4 / N38

Environment	Effective steel pull	Effect
Air (land)	0.09 kg	Standard
Water (riverbed)	0.10 kg (+0.01 kg Buoyancy gain)	+14.5%

Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

Water displaces steel, making heavy objects slightly lighter. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Shear force

*Caution: On a vertical wall, the magnet retains merely ~20% of its max power.

2. Steel thickness impact

*Thin metal sheet (e.g. 0.5mm PC case) drastically reduces the holding force.

3. Heat tolerance

*For N38 grade, the safety limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.21

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The P_c (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher P_c value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical and environmental data

Material specification

iron (Fe)	64% – 68%
neodymium (Nd)	29% – 32%
boron (B)	1.1% – 1.2%
dysprosium (Dy)	0.5% – 2.0%
coating (Ni-Cu-Ni)	< 0.05%

Environmental data

recyclability (EoL)	100%
recycled raw materials	~10% (pre-cons)
carbon footprint	low / zredukowany
waste code (EWC)	16 02 16

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: bok@dhit.pl

batch number/type

id: 010055-2025

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MW 50x20 / N38 - cylindrical magnet

106.96 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MPL 13x10x5 / N35H - lamellar magnet

2.58 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MPL 50x20x5 / N38 - lamellar magnet

14.56 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MW 5x2 / N38 - cylindrical magnet

0.1845 ZŁ brutto / pcs

The presented product is an extremely powerful cylinder magnet, manufactured from modern NdFeB material, which, at dimensions of Ø2x4 mm, guarantees optimal power. The MW 2x4 / N38 component boasts high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 0.09 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 0.86 N with a weight of only 0.09 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.

Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure long-term durability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.

Magnets NdFeB grade N38 are suitable for 90% of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø2x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

This model is characterized by dimensions Ø2x4 mm, which, at a weight of 0.09 g, makes it an element with impressive magnetic energy density. The value of 0.86 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.09 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.

Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 2 mm. Such an arrangement is most desirable when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized through the diameter if your project requires it.

Advantages as well as disadvantages of rare earth magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:

They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (according to literature),
They are extremely resistant to demagnetization induced by external magnetic fields,
The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
Magnets are characterized by excellent magnetic induction on the outer side,
Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures approaching 230°C and above...
Possibility of exact modeling as well as modifying to concrete applications,
Universal use in electronics industry – they find application in data components, electric drive systems, diagnostic systems, and modern systems.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Drawbacks and weaknesses of neodymium magnets: tips and applications.

To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
We suggest a housing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complicated forms.
Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the context of child safety. Furthermore, small components of these magnets are able to complicate diagnosis medical when they are in the body.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum magnetic pulling force – what affects it?

The specified lifting capacity refers to the maximum value, measured under ideal test conditions, specifically:

with the application of a sheet made of special test steel, guaranteeing full magnetic saturation
with a thickness minimum 10 mm
with a plane free of scratches
without any insulating layer between the magnet and steel
during detachment in a direction perpendicular to the mounting surface
in neutral thermal conditions

Determinants of practical lifting force of a magnet

Effective lifting capacity impacted by working environment parameters, mainly (from most important):

Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet holds much less (often approx. 20-30% of maximum force).
Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
Plate material – mild steel attracts best. Higher carbon content lower magnetic permeability and lifting capacity.
Smoothness – ideal contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the load capacity.

H&S for magnets

Conscious usage

Use magnets with awareness. Their immense force can surprise even professionals. Stay alert and do not underestimate their force.

Material brittleness

Despite metallic appearance, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Combustion hazard

Fire hazard: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.

Skin irritation risks

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation happens, cease handling magnets and wear gloves.

Danger to pacemakers

Individuals with a ICD have to keep an large gap from magnets. The magnetic field can interfere with the operation of the implant.

No play value

Neodymium magnets are not intended for children. Accidental ingestion of several magnets may result in them connecting inside the digestive tract, which poses a direct threat to life and requires urgent medical intervention.

Magnetic media

Avoid bringing magnets close to a purse, computer, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.

Physical harm

Large magnets can smash fingers instantly. Do not place your hand between two attracting surfaces.

Precision electronics

Be aware: neodymium magnets produce a field that disrupts sensitive sensors. Keep a separation from your mobile, device, and GPS.

Thermal limits

Keep cool. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, ask us about HT versions (H, SH, UH).

Important! Want to know more? Read our article: Are neodymium magnets dangerous?

MW 2x4 / N38 - cylindrical magnet

Physical properties - MW 2x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the assembly - report

Table 1: Static pull force (pull vs gap) - characteristics MW 2x4 / N38

Table 2: Vertical capacity (vertical surface) MW 2x4 / N38

Table 3: Wall mounting (shearing) - vertical pull MW 2x4 / N38

Table 4: Material efficiency (saturation) - sheet metal selection MW 2x4 / N38

Table 5: Working in heat (material behavior) - power drop MW 2x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - field range MW 2x4 / N38

Table 7: Hazards (implants) - warnings MW 2x4 / N38

Table 8: Collisions (kinetic energy) - collision effects MW 2x4 / N38

Table 9: Surface protection spec MW 2x4 / N38

Table 10: Electrical data (Pc) MW 2x4 / N38

Table 11: Physics of underwater searching MW 2x4 / N38

1. Shear force

2. Steel thickness impact

3. Heat tolerance

4. Demagnetization curve and operating point (B-H)

Material specification

Environmental data

Pulling force

Field Strength

See also proposals

MW 50x20 / N38 - cylindrical magnet

MPL 13x10x5 / N35H - lamellar magnet

MPL 50x20x5 / N38 - lamellar magnet

MW 5x2 / N38 - cylindrical magnet

Advantages as well as disadvantages of rare earth magnets.

Pros

Weaknesses

Lifting parameters

Maximum magnetic pulling force – what affects it?

Determinants of practical lifting force of a magnet

H&S for magnets

Conscious usage

Material brittleness

Combustion hazard

Skin irritation risks

Danger to pacemakers

No play value

Magnetic media

Physical harm

Precision electronics

Thermal limits

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - characteristics
MW 2x4 / N38

Table 2: Vertical capacity (vertical surface)
MW 2x4 / N38

Table 3: Wall mounting (shearing) - vertical pull
MW 2x4 / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MW 2x4 / N38

Table 5: Working in heat (material behavior) - power drop
MW 2x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 2x4 / N38

Table 7: Hazards (implants) - warnings
MW 2x4 / N38

Table 8: Collisions (kinetic energy) - collision effects
MW 2x4 / N38

Table 9: Surface protection spec
MW 2x4 / N38

Table 10: Electrical data (P_c)
MW 2x4 / N38

Table 11: Physics of underwater searching
MW 2x4 / N38