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MPL 5x5x1.5 / N38 - lamellar 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

lamellar magnet

Catalog no 020172

GTIN/EAN: 5906301811787

5.00

length

5 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

1.5 mm [±0,1 mm]

Weight

0.28 g

Magnetization Direction

↑ axial

Load capacity

0.58 kg / 5.68 N

Magnetic Induction

293.49 mT / 2935 Gs

Coating

[NiCuNi] Nickel

view technical specifications »

0.1845 ZŁ with VAT / pcs + price for transport

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Technical - MPL 5x5x1.5 / N38 - lamellar magnet

Specification / characteristics - MPL 5x5x1.5 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020172
GTIN/EAN	5906301811787
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
length	5 mm [±0,1 mm]
Width	5 mm [±0,1 mm]
Height	1.5 mm [±0,1 mm]
Weight	0.28 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.58 kg / 5.68 N
Magnetic Induction ~ ?	293.49 mT / 2935 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 5x5x1.5 / N38 - lamellar 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

Physical modeling of the magnet - data

Presented information represent the outcome of a physical calculation. Results are based on algorithms for the material Nd₂Fe₁₄B. Real-world conditions may differ from theoretical values. Treat these data as a preliminary roadmap for designers.

Table 1: Static force (pull vs gap) - power drop
MPL 5x5x1.5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	2932 Gs 293.2 mT	0.58 kg / 580.0 g 5.7 N	safe
1 mm	2036 Gs 203.6 mT	0.28 kg / 279.6 g 2.7 N	safe
2 mm	1228 Gs 122.8 mT	0.10 kg / 101.7 g 1.0 N	safe
3 mm	727 Gs 72.7 mT	0.04 kg / 35.7 g 0.3 N	safe
5 mm	285 Gs 28.5 mT	0.01 kg / 5.5 g 0.1 N	safe
10 mm	54 Gs 5.4 mT	0.00 kg / 0.2 g 0.0 N	safe
15 mm	18 Gs 1.8 mT	0.00 kg / 0.0 g 0.0 N	safe
20 mm	8 Gs 0.8 mT	0.00 kg / 0.0 g 0.0 N	safe
30 mm	3 Gs 0.3 mT	0.00 kg / 0.0 g 0.0 N	safe
50 mm	1 Gs 0.1 mT	0.00 kg / 0.0 g 0.0 N	safe

Grip strength weakens significantly with every mm of gap. Keep in mind that every additional insulation layer (e.g., contamination, varnish, rust) significantly diminishes the holding power. Magnetic products work most effectively during direct contact; gap drastically cuts the force. Observe how quickly the pull force fall, when the magnet does not touch tightly to the steel surface. When designing the arrangement, discard redundant distances.

Table 2: Vertical hold (wall)
MPL 5x5x1.5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.12 kg / 116.0 g 1.1 N
1 mm	Stal (~0.2)	0.06 kg / 56.0 g 0.5 N
2 mm	Stal (~0.2)	0.02 kg / 20.0 g 0.2 N
3 mm	Stal (~0.2)	0.01 kg / 8.0 g 0.1 N
5 mm	Stal (~0.2)	0.00 kg / 2.0 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 table below presents the approximate shear load necessary to cause the downward movement of the magnet downwards against a upright steel plate (assuming standard friction coefficient). The holding force is a function of the separation distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MPL 5x5x1.5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.17 kg / 174.0 g 1.7 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.12 kg / 116.0 g 1.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.06 kg / 58.0 g 0.6 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.29 kg / 290.0 g 2.8 N

When mounting a magnet on a vertical wall (e.g., a car body), it you can count on just approx. 20%-30% of its maximum pull force. Gravitational force as well as a low friction coefficient cause that magnets slip faster than they pop off the substrate. Planning a hanger? Consider that the shear force is noticeably lower than the maximum static pull force. On a painted metal, the holder will slip down under a significantly smaller load. Utilizing a rubberized pad can significantly improve the result.

Table 4: Material efficiency (substrate influence) - power losses
MPL 5x5x1.5 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.06 kg / 58.0 g 0.6 N
1 mm	25%	0.15 kg / 145.0 g 1.4 N
2 mm	50%	0.29 kg / 290.0 g 2.8 N
5 mm	100%	0.58 kg / 580.0 g 5.7 N
10 mm	100%	0.58 kg / 580.0 g 5.7 N

A thin metal plate is incapable of focus the entire magnetic field, which wastes potential of the holder. Should you mount a strong magnet to a thin surface, the flux will pass right through and the attraction force will be weaker. To squeeze the maximum of this magnet's potential, you need a suitably thick piece of steel. The saturation effect means that on sheet metal structures (e.g., car bodies), the holder works worse. We recommend selecting the steel dimension from these parameters.

Table 5: Thermal resistance (stability) - thermal limit
MPL 5x5x1.5 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	0.58 kg / 580.0 g 5.7 N	OK
40 °C	-2.2%	0.57 kg / 567.2 g 5.6 N	OK
60 °C	-4.4%	0.55 kg / 554.5 g 5.4 N
80 °C	-6.6%	0.54 kg / 541.7 g 5.3 N
100 °C	-28.8%	0.41 kg / 413.0 g 4.1 N

Classic neodymiums irreversibly lose parameters above the temperature limit. Protect against heat – high temperature can permanently damage this product. With every degree above norm, the magnet's power momentarily decreases. Refrain from using this product close to ovens higher than its safe range. Exceeding the critical threshold will lead to irreversible degradation of magnetism.

*Engineering note: Thermal stability depends not only on the material grade, but also on the magnet's shape. Thin magnets (low Pc) risk losing magnetic properties sooner than taller cylinders. Warning indicator in the table signals a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - forces in the system
MPL 5x5x1.5 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	1.33 kg / 1325 g 13.0 N 4 518 Gs	N/A
1 mm	0.97 kg / 974 g 9.6 N 5 027 Gs	0.88 kg / 876 g 8.6 N ~0 Gs
2 mm	0.64 kg / 639 g 6.3 N 4 071 Gs	0.57 kg / 575 g 5.6 N ~0 Gs
3 mm	0.39 kg / 392 g 3.8 N 3 188 Gs	0.35 kg / 352 g 3.5 N ~0 Gs
5 mm	0.14 kg / 137 g 1.3 N 1 886 Gs	0.12 kg / 123 g 1.2 N ~0 Gs
10 mm	0.01 kg / 12 g 0.1 N 569 Gs	0.01 kg / 11 g 0.1 N ~0 Gs
20 mm	0.00 kg / 0 g 0.0 N 108 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
50 mm	0.00 kg / 0 g 0.0 N 9 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two magnets attract each other from a significantly greater distance than a magnet and steel setup. Such a system of two magnets produces a massive flux and a wider radius of action. Planning to create a solid fastener? Apply two magnets instead of one magnet and a striker plate. Exercise caution that when bringing together two magnets, the pinch force is massive. The levitation is marginally weaker than the connection force, but still impressive.
*Flux density in repulsion mode is approximately ~0 Gs at the midpoint of the gap (due to field cancellation).

Table 7: Safety (HSE) (electronics) - warnings
MPL 5x5x1.5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	2.5 cm
Hearing aid	10 Gs (1.0 mT)	2.0 cm
Timepiece	20 Gs (2.0 mT)	1.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	1.5 cm
Remote	50 Gs (5.0 mT)	1.5 cm
Payment card	400 Gs (40.0 mT)	0.5 cm
HDD hard drive	600 Gs (60.0 mT)	0.5 cm

Powerful magnet radiation is a large risk to IT equipment and medical implants. These NdFeB products generate a flux that disrupts operation of sensitive medical devices. Remember: the invisible magnetic field passes through tissues and housings. Exceptional care must be exercised by people with hearing aids and drug dispensers. Also at risk are: automatic timepieces, car keys, speakers, and screens. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MPL 5x5x1.5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	45.91 km/h (12.75 m/s)	0.02 J
30 mm	79.50 km/h (22.08 m/s)	0.07 J
50 mm	102.64 km/h (28.51 m/s)	0.11 J
100 mm	145.15 km/h (40.32 m/s)	0.23 J

Magnetic elements are prone to chipping – a collision with steel causes immediate chipping. Control the attraction moment – a magnet released freely becomes dangerous. Kinetic force can cause material chips or painful pinches to skin. Hold the magnet firmly during mounting so it doesn't slam with momentum against the metal. A collision at high speed means shattering of the magnet. Wear safety glasses when working with powerful specimens.

Table 9: Corrosion resistance
MPL 5x5x1.5 / 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)

The following table defines the conditions under which this product can be safely used. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MPL 5x5x1.5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	799 Mx	8.0 µWb
P_c Coefficient	0.36	Low (Flat)

Total magnetic flux emitted by the magnet pole. Key data for generator designers as well as sensors. The P_c coefficient defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MPL 5x5x1.5 / N38

Environment	Effective steel pull	Effect
Air (land)	0.58 kg	Standard
Water (riverbed)	0.66 kg (+0.08 kg Buoyancy gain)	+14.5%

Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

The magnetic field penetrates through water without any losses. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Wall mount (shear)

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

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.

3. Temperature resistance

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.36

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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 specification and ecology

Chemical composition

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: 020172-2025

Magnet Unit Converter

Pulling force

Pounds (lbs)

Field Strength

Gauss (Gs)

Induction (T)

Simply complete one field, to let the converter calculate the rest automatically.

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Model MPL 5x5x1.5 / N38 features a flat shape and industrial pulling force, making it a perfect solution for building separators and machines. This rectangular block with a force of 5.68 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.

The key to success is sliding the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. To separate the MPL 5x5x1.5 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend care, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Using a screwdriver risks destroying the coating and permanently cracking the magnet.

They constitute a key element in the production of generators and material handling systems. Thanks to the flat surface and high force (approx. 0.58 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.

Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).

The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.

The presented product is a neodymium magnet with precisely defined parameters: 5 mm (length), 5 mm (width), and 1.5 mm (thickness). The key parameter here is the lifting capacity amounting to approximately 0.58 kg (force ~5.68 N), which, with such a flat shape, proves the high power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros and cons of Nd₂Fe₁₄B magnets.

Pros

Besides their durability, neodymium magnets are valued for these benefits:

They retain attractive force for around ten years – the drop is just ~1% (according to analyses),
They have excellent resistance to magnetism drop as a result of external fields,
The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
Magnetic induction on the working part of the magnet turns out to be maximum,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
Possibility of precise creating and adjusting to defined requirements,
Huge importance in modern industrial fields – they are used in HDD drives, electromotive mechanisms, advanced medical instruments, also other advanced devices.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:

To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
Limited possibility of creating threads in the magnet and complicated forms - preferred is a housing - magnet mounting.
Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these products can complicate diagnosis medical in case of swallowing.
Due to complex production process, their price is higher than average,

Holding force characteristics

Highest magnetic holding force – what affects it?

The lifting capacity listed is a result of laboratory testing executed under the following configuration:

with the contact of a sheet made of special test steel, guaranteeing maximum field concentration
whose transverse dimension reaches at least 10 mm
with an ground touching surface
without the slightest air gap between the magnet and steel
for force applied at a right angle (in the magnet axis)
at temperature approx. 20 degrees Celsius

Determinants of practical lifting force of a magnet

Holding efficiency impacted by specific conditions, including (from most important):

Distance – existence of foreign body (paint, dirt, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
Load vector – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
Material composition – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
Base smoothness – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity was determined with the use of a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate reduces the holding force.

Safety rules for work with neodymium magnets

Keep away from children

Only for adults. Small elements can be swallowed, causing serious injuries. Store out of reach of kids and pets.

Crushing risk

Danger of trauma: The attraction force is so immense that it can result in hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Avoid contact if allergic

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction appears, immediately stop working with magnets and wear gloves.

Precision electronics

GPS units and mobile phones are highly sensitive to magnetic fields. Close proximity with a strong magnet can decalibrate the sensors in your phone.

Danger to pacemakers

Warning for patients: Strong magnetic fields affect electronics. Keep minimum 30 cm distance or request help to work with the magnets.

Material brittleness

Protect your eyes. Magnets can explode upon violent connection, ejecting shards into the air. Wear goggles.

Combustion hazard

Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Safe operation

Use magnets with awareness. Their powerful strength can surprise even professionals. Plan your moves and do not underestimate their power.

Data carriers

Data protection: Strong magnets can ruin payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).

Permanent damage

Watch the temperature. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.

Danger! Details about risks in the article: Safety of working with magnets.

MPL 5x5x1.5 / N38 - lamellar magnet

Technical - MPL 5x5x1.5 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the magnet - data

Table 1: Static force (pull vs gap) - power drop MPL 5x5x1.5 / N38

Table 2: Vertical hold (wall) MPL 5x5x1.5 / N38

Table 3: Vertical assembly (sliding) - vertical pull MPL 5x5x1.5 / N38

Table 4: Material efficiency (substrate influence) - power losses MPL 5x5x1.5 / N38

Table 5: Thermal resistance (stability) - thermal limit MPL 5x5x1.5 / N38

Table 6: Two magnets (attraction) - forces in the system MPL 5x5x1.5 / N38

Table 7: Safety (HSE) (electronics) - warnings MPL 5x5x1.5 / N38

Table 8: Dynamics (kinetic energy) - collision effects MPL 5x5x1.5 / N38

Table 9: Corrosion resistance MPL 5x5x1.5 / N38

Table 10: Electrical data (Flux) MPL 5x5x1.5 / N38

Table 11: Underwater work (magnet fishing) MPL 5x5x1.5 / N38

1. Wall mount (shear)

2. Plate thickness effect

3. Temperature resistance

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

Chemical composition

Environmental data

Pulling force

Field Strength

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MW 45x35 / N38 - cylindrical magnet

Pros and cons of Nd2Fe14B magnets.

Pros

Disadvantages

Holding force characteristics

Highest magnetic holding force – what affects it?

Determinants of practical lifting force of a magnet

Safety rules for work with neodymium magnets

Keep away from children

Crushing risk

Avoid contact if allergic

Precision electronics

Danger to pacemakers

Material brittleness

Combustion hazard

Safe operation

Data carriers

Permanent damage

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs gap) - power drop
MPL 5x5x1.5 / N38

Table 2: Vertical hold (wall)
MPL 5x5x1.5 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MPL 5x5x1.5 / N38

Table 4: Material efficiency (substrate influence) - power losses
MPL 5x5x1.5 / N38

Table 5: Thermal resistance (stability) - thermal limit
MPL 5x5x1.5 / N38

Table 6: Two magnets (attraction) - forces in the system
MPL 5x5x1.5 / N38

Table 7: Safety (HSE) (electronics) - warnings
MPL 5x5x1.5 / N38

Table 8: Dynamics (kinetic energy) - collision effects
MPL 5x5x1.5 / N38

Table 9: Corrosion resistance
MPL 5x5x1.5 / N38

Table 10: Electrical data (Flux)
MPL 5x5x1.5 / N38

Table 11: Underwater work (magnet fishing)
MPL 5x5x1.5 / N38

Pros and cons of Nd₂Fe₁₄B magnets.