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MW 16x4 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010034

GTIN/EAN: 5906301810339

5.00

Diameter Ø

16 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

6.03 g

Magnetization Direction

↑ axial

Load capacity

4.43 kg / 43.46 N

Magnetic Induction

277.14 mT / 2771 Gs

Coating

[NiCuNi] Nickel

product specifications »

3.39 ZŁ with VAT / pcs + price for transport

2.76 ZŁ net + 23% VAT / pcs

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Technical - MW 16x4 / N38 - cylindrical magnet

Specification / characteristics - MW 16x4 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010034
GTIN/EAN 5906301810339
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 16 mm [±0,1 mm]
Height 4 mm [±0,1 mm]
Weight 6.03 g
Magnetization Direction ↑ axial
Load capacity ~ ? 4.43 kg / 43.46 N
Magnetic Induction ~ ? 277.14 mT / 2771 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 16x4 / 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

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 assembly - technical parameters

Presented information are the direct effect of a engineering analysis. Values rely on models for the class Nd2Fe14B. Operational performance might slightly deviate from the simulation results. Please consider these data as a preliminary roadmap for designers.

Table 1: Static pull force (pull vs gap) - power drop
MW 16x4 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2771 Gs
277.1 mT
 4.43 kg / 9.77 lbs
4430.0 g / 43.5 N
 warning
1 mm 2517 Gs
251.7 mT
 3.66 kg / 8.06 lbs
3656.3 g / 35.9 N
 warning
2 mm 2216 Gs
221.6 mT
 2.83 kg / 6.25 lbs
2834.9 g / 27.8 N
 warning
3 mm 1906 Gs
190.6 mT
 2.10 kg / 4.62 lbs
2096.1 g / 20.6 N
 warning
5 mm 1348 Gs
134.8 mT
 1.05 kg / 2.31 lbs
1048.6 g / 10.3 N
 safe
10 mm 542 Gs
54.2 mT
 0.17 kg / 0.37 lbs
169.4 g / 1.7 N
 safe
15 mm 244 Gs
24.4 mT
 0.03 kg / 0.08 lbs
34.2 g / 0.3 N
 safe
20 mm 125 Gs
12.5 mT
 0.01 kg / 0.02 lbs
9.1 g / 0.1 N
 safe
30 mm 45 Gs
4.5 mT
 0.00 kg / 0.00 lbs
1.1 g / 0.0 N
 safe
50 mm 11 Gs
1.1 mT
 0.00 kg / 0.00 lbs
0.1 g / 0.0 N
 safe
Pulling power decreases significantly with every mm of spacing. Note that even the smallest gap (e.g., dirt, paint, dust) significantly diminishes the holding power. Neodymiums operate most effectively during direct contact; distance nullifies the force. Analyze how quickly the parameters plummet, when the product does not adhere tightly to the steel surface. When designing the assembly, avoid redundant distances.

Table 2: Sliding force (wall)
MW 16x4 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.89 kg / 1.95 lbs
886.0 g / 8.7 N
1 mm Stal (~0.2) 0.73 kg / 1.61 lbs
732.0 g / 7.2 N
2 mm Stal (~0.2) 0.57 kg / 1.25 lbs
566.0 g / 5.6 N
3 mm Stal (~0.2) 0.42 kg / 0.93 lbs
420.0 g / 4.1 N
5 mm Stal (~0.2) 0.21 kg / 0.46 lbs
210.0 g / 2.1 N
10 mm Stal (~0.2) 0.03 kg / 0.07 lbs
34.0 g / 0.3 N
15 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
This section indicates the theoretical holding capacity necessary to start the sliding of the magnet vertically against a upright steel wall (assuming standard friction). This value depends on the air gap between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 16x4 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.33 kg / 2.93 lbs
1329.0 g / 13.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.89 kg / 1.95 lbs
886.0 g / 8.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.44 kg / 0.98 lbs
443.0 g / 4.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.22 kg / 4.88 lbs
2215.0 g / 21.7 N
When mounting a magnet on a upright wall (e.g., a board), it will maintain just approx. 20%-30% of its maximum pull force. Gravity as well as a low friction coefficient influence the fact that products slip easier than they pull off. Planning a wall mount? Remember that the sliding force is significantly lower than the maximum static pull force. On a slippery surface, the holder will give way down under a significantly smaller cargo. Application of an anti-slip coating can significantly increase the grip.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 16x4 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.44 kg / 0.98 lbs
443.0 g / 4.3 N
1 mm
25%
 1.11 kg / 2.44 lbs
1107.5 g / 10.9 N
2 mm
50%
 2.22 kg / 4.88 lbs
2215.0 g / 21.7 N
3 mm
75%
 3.32 kg / 7.32 lbs
3322.5 g / 32.6 N
5 mm
100%
 4.43 kg / 9.77 lbs
4430.0 g / 43.5 N
10 mm
100%
 4.43 kg / 9.77 lbs
4430.0 g / 43.5 N
11 mm
100%
 4.43 kg / 9.77 lbs
4430.0 g / 43.5 N
12 mm
100%
 4.43 kg / 9.77 lbs
4430.0 g / 43.5 N
A thin sheet is not enough to take in the full magnetic flux, which wastes potential of the magnet. If you attach a powerful product to a too thin substrate, the field will penetrate right through and the holding will be smaller. To utilize 100% of this magnet's potential, you require a sufficiently solid element of steel. The saturation effect causes that on delicate walls (e.g., car bodies), the product works worse. We advise picking the steel cross-section according to the table below.

Table 5: Thermal stability (stability) - resistance threshold
MW 16x4 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 4.43 kg / 9.77 lbs
4430.0 g / 43.5 N
 OK
40 °C -2.2% 4.33 kg / 9.55 lbs
4332.5 g / 42.5 N
 OK
60 °C -4.4% 4.24 kg / 9.34 lbs
4235.1 g / 41.5 N
80 °C -6.6% 4.14 kg / 9.12 lbs
4137.6 g / 40.6 N
100 °C -28.8% 3.15 kg / 6.95 lbs
3154.2 g / 30.9 N
Ordinary NdFeB products lose power above the temperature limit. Avoid high temperatures – excessive heat can permanently destroy this magnet. With every degree above norm, the neodymium's capacity momentarily lowers. Avoid using this magnet close to ovens exceeding its operating temperature limit. Too high temperature will lead to irreversible degradation of magnetic properties.
*Engineering note: Heat tolerance is determined by both grade, but also on the magnet's shape. Flat magnets (pancake types) are more susceptible to demagnetization under lower heat stress compared to rod magnets. Red status in the table indicates permanent field degradation for this particular item.

Table 6: Two magnets (repulsion) - field range
MW 16x4 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 9.51 kg / 20.98 lbs
4 379 Gs
1.43 kg / 3.15 lbs
1427 g / 14.0 N
 N/A
1 mm 8.72 kg / 19.23 lbs
5 306 Gs
1.31 kg / 2.88 lbs
1309 g / 12.8 N
 7.85 kg / 17.31 lbs
~0 Gs
2 mm 7.85 kg / 17.31 lbs
5 034 Gs
1.18 kg / 2.60 lbs
1178 g / 11.6 N
 7.07 kg / 15.58 lbs
~0 Gs
3 mm 6.96 kg / 15.35 lbs
4 740 Gs
1.04 kg / 2.30 lbs
1044 g / 10.2 N
 6.27 kg / 13.81 lbs
~0 Gs
5 mm 5.26 kg / 11.60 lbs
4 121 Gs
0.79 kg / 1.74 lbs
789 g / 7.7 N
 4.74 kg / 10.44 lbs
~0 Gs
10 mm 2.25 kg / 4.97 lbs
2 696 Gs
0.34 kg / 0.74 lbs
338 g / 3.3 N
 2.03 kg / 4.47 lbs
~0 Gs
20 mm 0.36 kg / 0.80 lbs
1 083 Gs
0.05 kg / 0.12 lbs
55 g / 0.5 N
 0.33 kg / 0.72 lbs
~0 Gs
50 mm 0.01 kg / 0.01 lbs
143 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.01 lbs
89 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.00 lbs
59 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.00 lbs
41 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
90 mm 0.00 kg / 0.00 lbs
29 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
100 mm 0.00 kg / 0.00 lbs
22 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two magnets attract each other from a significantly greater distance than a magnet and sheet setup. The connection of magnet-to-magnet generates a stronger field and a further horizon of performance. Want to build a strong closure? Utilize two neodymiums instead of a neodymium and a striker plate. Exercise caution that when bringing together two magnets, the pinch force is extreme. The levitation is a bit weaker than the connection force, but still large.
*Flux density in repulsion mode is approximately ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Important: Figures refer to friction force of two identical magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (electronics) - precautionary measures
MW 16x4 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 7.0 cm
Hearing aid 10 Gs (1.0 mT) 5.5 cm
Mechanical watch 20 Gs (2.0 mT) 4.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.5 cm
Remote 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
A strong magnetic field is a real danger to electronics as well as pacemakers. These magnets produce a flux that destroys function of sensitive medical devices. Remember: the invisible magnetic field passes through tissues and plastic. Special caution must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, car keys, speakers, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Collisions (cracking risk) - warning
MW 16x4 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 27.98 km/h
(7.77 m/s)
 0.18 J
30 mm 47.35 km/h
(13.15 m/s)
 0.52 J
50 mm 61.12 km/h
(16.98 m/s)
 0.87 J
100 mm 86.44 km/h
(24.01 m/s)
 1.74 J
Magnetic elements are prone to chipping – a strong collision with metal causes immediate chipping. Control the attraction moment – a magnet released freely turns into a projectile. Striking energy can cause material chips or dangerous crushing to fingers. Be sure to control the product during bringing near metal so it doesn't hit violently against the metal. A collision at high speed ends with a crack of the neodymium. Use safety goggles when handling with large magnets.

Table 9: Coating parameters (durability)
MW 16x4 / 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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MW 16x4 / N38

Parameter Value SI Unit / Description
Magnetic Flux 6 192 Mx 61.9 µWb
Pc Coefficient 0.35 Low (Flat)
Total magnetic flux passing through the magnet pole. Key data when building generators as well as sensors. Pc value determines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MW 16x4 / N38

Environment Effective steel pull Effect
Air (land) 4.43 kg Standard
Water (riverbed) 5.07 kg
(+0.64 kg buoyancy gain)
+14.5%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Sliding resistance

*Caution: On a vertical surface, the magnet retains just approx. 20-30% of its nominal pull.

2. Plate thickness effect

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

3. Heat tolerance

*For standard magnets, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.35

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 Pc (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 Pc 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
Elemental analysis
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%
Sustainability
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: 010034-2026
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This product is an exceptionally strong cylinder magnet, composed of advanced NdFeB material, which, with dimensions of Ø16x4 mm, guarantees optimal power. The MW 16x4 / N38 model is characterized by high dimensional repeatability and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 4.43 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is created for building electric motors, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the pull force of 43.46 N with a weight of only 6.03 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 16.1 mm) using epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are suitable for 90% of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø16x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 16 mm and height 4 mm. The key parameter here is the lifting capacity amounting to approximately 4.43 kg (force ~43.46 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 4 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is standard 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 diametrically if your project requires it.

Strengths as well as weaknesses of neodymium magnets.

Advantages

Besides their tremendous pulling force, neodymium magnets offer the following advantages:
  • Their magnetic field is maintained, and after approximately 10 years it drops only by ~1% (according to research),
  • They maintain their magnetic properties even under external field action,
  • A magnet with a shiny nickel surface is more attractive,
  • Neodymium magnets deliver maximum magnetic induction on a small surface, which ensures high operational effectiveness,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures reaching 230°C and above...
  • Due to the potential of precise shaping and customization to specialized requirements, neodymium magnets can be produced in a wide range of forms and dimensions, which amplifies use scope,
  • Wide application in modern industrial fields – they serve a role in HDD drives, electric drive systems, advanced medical instruments, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which allows their use in small systems

Limitations

Disadvantages of neodymium magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • Limited possibility of making nuts in the magnet and complex shapes - recommended is a housing - magnet mounting.
  • Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that small elements of these magnets can disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Magnetic strength at its maximum – what affects it?

Holding force of 4.43 kg is a measurement result performed under standard conditions:
  • on a base made of structural steel, perfectly concentrating the magnetic flux
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • with an ground touching surface
  • with direct contact (no impurities)
  • during detachment in a direction vertical to the mounting surface
  • in temp. approx. 20°C

Key elements affecting lifting force

It is worth knowing that the application force will differ influenced by elements below, in order of importance:
  • Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 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 several times lower (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Steel type – mild steel attracts best. Higher carbon content lower magnetic permeability and holding force.
  • Surface finish – ideal contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
  • Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, however under shearing force the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance between the magnet and the plate decreases the lifting capacity.

Precautions when working with NdFeB magnets
Physical harm

Danger of trauma: The pulling power is so immense that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Keep away from children

Neodymium magnets are not intended for children. Accidental ingestion of multiple magnets may result in them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates immediate surgery.

Magnet fragility

NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Collision of two magnets will cause them cracking into small pieces.

Conscious usage

Before use, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Do not overheat magnets

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will permanently weaken its properties and pulling force.

Electronic hazard

Powerful magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Stay away of at least 10 cm.

Threat to navigation

An intense magnetic field negatively affects the operation of magnetometers in phones and GPS navigation. Do not bring magnets near a smartphone to prevent damaging the sensors.

Allergic reactions

Some people suffer from a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Prolonged contact might lead to dermatitis. We recommend wear protective gloves.

Life threat

Patients with a pacemaker must keep an safe separation from magnets. The magnetic field can stop the functioning of the implant.

Dust is flammable

Mechanical processing of NdFeB material poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Warning! Learn more about risks in the article: Magnet Safety Guide.