← previous
next →
Product available Ships today (order by 14:00) CO2 GPSR PPWR REACH

MP 20x8/4x3 / N38 - ring magnet

ring magnet

Catalog no 030187

GTIN/EAN: 5906301812043

5.00
Load capacity 3.14 kg / 30.79 N Magnetic Induction 178.11 mT / 1781 Gs
Diameter
20 mm [±0,1 mm]
internal diameter Ø
8/4 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
6.79 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

check technical specifications »

2.92 zł net / pcs

3.59 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
2.92 zł
3.59 zł
price from 250 pcs
2.74 zł
3.38 zł
price from 900 pcs
2.57 zł
3.16 zł

Frequently asked questions

What is the hole in a ring magnet for?
For mounting on a screw or a shaft. The bore may be cylindrical or countersunk for a screw head. The hole removes magnet volume, so a ring holds less than a disc of the same outside diameter.
What is the polarisation?
Axial as standard — poles on the flat faces of the ring. Diametrical polarisation is made to order.
What sizes are available?
Outside diameter from 5 to 62 mm from stock. To order up to 200 mm outside diameter, 180 mm bore and 40 mm height, with a lead time of 25–35 days.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

PDF report Calculator
Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

Order by 14:00 and we’ll ship today!

Product card - MP 20x8/4x3 / N38 - ring magnet

Specification / characteristics - MP 20x8/4x3 / N38 - ring magnet

properties
properties values
Cat. no. 030187
GTIN/EAN 5906301812043
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 20 mm [±0,1 mm]
internal diameter Ø 8/4 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 6.79 g
Magnetization Direction ↑ axial
Load capacity ~ ? 3.14 kg / 30.79 N
Magnetic Induction ~ ? 178.11 mT / 1781 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 20x8/4x3 / N38 - ring magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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 product - report

Presented information represent the result of a engineering calculation. Results rely on models for the class Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Please consider these data as a supplementary guide for designers.

Table 1: Static pull force (pull vs gap) - power drop
MP 20x8/4x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1531 Gs
153.1 mT
 3.14 kg / 6.92 lbs
3140.0 g / 30.8 N
 medium risk
1 mm 1457 Gs
145.7 mT
 2.84 kg / 6.27 lbs
2843.2 g / 27.9 N
 medium risk
2 mm 1352 Gs
135.2 mT
 2.45 kg / 5.39 lbs
2446.6 g / 24.0 N
 medium risk
3 mm 1227 Gs
122.7 mT
 2.02 kg / 4.44 lbs
2016.2 g / 19.8 N
 medium risk
5 mm 963 Gs
96.3 mT
 1.24 kg / 2.74 lbs
1241.9 g / 12.2 N
 weak grip
10 mm 465 Gs
46.5 mT
 0.29 kg / 0.64 lbs
289.3 g / 2.8 N
 weak grip
15 mm 228 Gs
22.8 mT
 0.07 kg / 0.15 lbs
69.7 g / 0.7 N
 weak grip
20 mm 122 Gs
12.2 mT
 0.02 kg / 0.04 lbs
20.0 g / 0.2 N
 weak grip
30 mm 45 Gs
4.5 mT
 0.00 kg / 0.01 lbs
2.7 g / 0.0 N
 weak grip
50 mm 11 Gs
1.1 mT
 0.00 kg / 0.00 lbs
0.2 g / 0.0 N
 weak grip
Pulling power weakens sharply with every mm of spacing. Note that even a very thin break (e.g., dirt, varnish, dust) strongly reduces the pull force. Magnetic products work strongest at the point of direct contact; gap nullifies the power. Analyze how rapidly the load capacity plummet, when the magnet does not adhere flatly to the steel surface. When planning the assembly, discard additional spacers.

Table 2: Slippage force (wall)
MP 20x8/4x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.63 kg / 1.38 lbs
628.0 g / 6.2 N
1 mm Stal (~0.2) 0.57 kg / 1.25 lbs
568.0 g / 5.6 N
2 mm Stal (~0.2) 0.49 kg / 1.08 lbs
490.0 g / 4.8 N
3 mm Stal (~0.2) 0.40 kg / 0.89 lbs
404.0 g / 4.0 N
5 mm Stal (~0.2) 0.25 kg / 0.55 lbs
248.0 g / 2.4 N
10 mm Stal (~0.2) 0.06 kg / 0.13 lbs
58.0 g / 0.6 N
15 mm Stal (~0.2) 0.01 kg / 0.03 lbs
14.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 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
The table below presents the estimated shear load needed to cause the sliding of the magnet vertically along a vertical steel wall (considering typical friction). The holding force varies with the separation distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 20x8/4x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.94 kg / 2.08 lbs
942.0 g / 9.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.63 kg / 1.38 lbs
628.0 g / 6.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.31 kg / 0.69 lbs
314.0 g / 3.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.57 kg / 3.46 lbs
1570.0 g / 15.4 N
When hanging a magnet on a vertical wall (e.g., a car body), it will only hold barely approx. 1/5 of its nominal power. Gravity and a low friction coefficient mean that products move down easier than they detach. Want to create a vertical fastening? Note that the shear force is significantly lower than the maximum static pull force. On a slippery surface, the element will slip down under a much lighter weight. Utilizing a rubberized coating can effectively improve the result.

Table 4: Material efficiency (substrate influence) - power losses
MP 20x8/4x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.31 kg / 0.69 lbs
314.0 g / 3.1 N
1 mm
25%
 0.79 kg / 1.73 lbs
785.0 g / 7.7 N
2 mm
50%
 1.57 kg / 3.46 lbs
1570.0 g / 15.4 N
3 mm
75%
 2.36 kg / 5.19 lbs
2355.0 g / 23.1 N
5 mm
100%
 3.14 kg / 6.92 lbs
3140.0 g / 30.8 N
10 mm
100%
 3.14 kg / 6.92 lbs
3140.0 g / 30.8 N
11 mm
100%
 3.14 kg / 6.92 lbs
3140.0 g / 30.8 N
12 mm
100%
 3.14 kg / 6.92 lbs
3140.0 g / 30.8 N
A too thin steel is incapable of absorb the entire magnetic field, which squanders power of the holder. Should you attach a powerful product to a too thin substrate, the magnetism will pass right through and the pull force will drop sharply. To utilize full efficiency of this magnet's power, you need a suitably thick piece of steel. The saturation effect causes that on delicate walls (e.g., appliance housings), the product holds weaker. We advise picking the steel dimension according to the table below.

Table 5: Thermal stability (stability) - power drop
MP 20x8/4x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 3.14 kg / 6.92 lbs
3140.0 g / 30.8 N
 OK
40 °C -2.2% 3.07 kg / 6.77 lbs
3070.9 g / 30.1 N
 OK
60 °C -4.4% 3.00 kg / 6.62 lbs
3001.8 g / 29.4 N
80 °C -6.6% 2.93 kg / 6.47 lbs
2932.8 g / 28.8 N
100 °C -28.8% 2.24 kg / 4.93 lbs
2235.7 g / 21.9 N
Classic neodymiums irreversibly lose parameters above the temperature limit. Protect against heat – heat can irreversibly destroy this magnet. With every degree above norm, the magnet's power temporarily drops. Do not use this magnet close to ovens higher than its operating temperature limit. Ignoring the limit will lead to permanent loss of magnetic properties.
*Engineering note: Thermal stability is determined by both grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) are more susceptible to demagnetization under lower heat stress than long magnets. The danger warning in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field range
MP 20x8/4x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 3.71 kg / 8.17 lbs
2 815 Gs
0.56 kg / 1.23 lbs
556 g / 5.5 N
 N/A
1 mm 3.55 kg / 7.83 lbs
2 998 Gs
0.53 kg / 1.17 lbs
533 g / 5.2 N
 3.20 kg / 7.05 lbs
~0 Gs
2 mm 3.36 kg / 7.40 lbs
2 915 Gs
0.50 kg / 1.11 lbs
503 g / 4.9 N
 3.02 kg / 6.66 lbs
~0 Gs
3 mm 3.13 kg / 6.90 lbs
2 815 Gs
0.47 kg / 1.04 lbs
470 g / 4.6 N
 2.82 kg / 6.21 lbs
~0 Gs
5 mm 2.63 kg / 5.81 lbs
2 582 Gs
0.40 kg / 0.87 lbs
395 g / 3.9 N
 2.37 kg / 5.23 lbs
~0 Gs
10 mm 1.47 kg / 3.23 lbs
1 926 Gs
0.22 kg / 0.48 lbs
220 g / 2.2 N
 1.32 kg / 2.91 lbs
~0 Gs
20 mm 0.34 kg / 0.75 lbs
930 Gs
0.05 kg / 0.11 lbs
51 g / 0.5 N
 0.31 kg / 0.68 lbs
~0 Gs
50 mm 0.01 kg / 0.02 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
90 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
30 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 wider radius than a magnet and steel combination. Such a system of magnet-to-magnet generates a stronger field and a further horizon of performance. Designing a powerful holder? Utilize two neodymiums instead of a neodymium and a striker plate. Remember that when bringing together two magnets, the collision energy is huge. The levitation is marginally weaker than the attraction, but still significant.
*The magnetic induction for N-N configuration reaches ~0 Gs at the midpoint of the gap (resulting from vector opposition).
Note: Figures show shear force of a pair of identical magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - warnings
MP 20x8/4x3 / 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
Powerful magnet radiation is a serious hazard to electronics as well as medical implants. These neodymiums produce a field that prevents correct functioning of digital equipment. Remember: the invisible magnetic field penetrates the body and housings. Special caution must be taken by people with hearing aids and drug dispensers. The risk also applies to: automatic timepieces, remotes, speakers, and displays. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - warning
MP 20x8/4x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 23.24 km/h
(6.46 m/s)
 0.14 J
30 mm 24.06 km/h
(6.68 m/s)
 0.15 J
50 mm 24.08 km/h
(6.69 m/s)
 0.15 J
100 mm 24.08 km/h
(6.69 m/s)
 0.15 J
Neodymium magnets are very brittle – a collision with steel can result in shattering. Watch the impact speed – a neodymium left loose becomes dangerous. Kinetic force can cause material chips or injury to fingers. Always hold the magnet during mounting so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h means shattering of the magnet. Use safety goggles when working with large magnets.

Table 9: Surface protection spec
MP 20x8/4x3 / 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. Note the thickness of the protective layer.

Table 10: Electrical data (Flux)
MP 20x8/4x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 044 Mx 50.4 µWb
Pc Coefficient 0.20 Low (Flat)
Total magnetic flux passing through the magnet pole. Key data for generator designers as well as sensors. The Pc coefficient defines the magnet's operating point.

Table 11: Submerged application
MP 20x8/4x3 / N38

Environment Effective steel pull Effect
Air (land) 3.14 kg Standard
Water (riverbed) 3.60 kg
(+0.46 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!
The magnetic field penetrates through water without any losses. Buoyancy helps in lifting finds.

1. Sliding resistance

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

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) significantly reduces the holding force.

3. Power loss vs temp

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.20

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

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%

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: 030187-2026
Magnet Unit Converter

Pulling force

Field Strength

Type your figure in any box, and all other values convert instantly.

View also products

SM 25x375 [2xM8] / N52 - magnetic separator
Product available Ships today (order by 14:00)

SM 25x375 [2xM8] / N52 - magnetic separator

1131.60 zł brutto / pcs
MW 5x7 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 5x7 / N38 - cylindrical magnet

0.726 zł brutto / pcs
BM 950x180x70 [4x M8] - magnetic beam
Product available Ships today (order by 14:00)

BM 950x180x70 [4x M8] - magnetic beam

8564.49 zł brutto / pcs
SM 32x400 [2xM8] / N42 - magnetic separator
Product available Ships today (order by 14:00)

SM 32x400 [2xM8] / N42 - magnetic separator

1340.70 zł brutto / pcs
It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. Thanks to the hole (often for a screw), this model enables quick installation to wood, wall, plastic, or metal. This product with a force of 3.14 kg works great as a door latch, speaker holder, or mounting element in devices.
This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. One turn too many can destroy the magnet, so do it slowly. It's a good idea to use a flexible washer under the screw head, which will cushion the stresses. Remember: cracking during assembly results from material properties, not a product defect.
These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but is not sufficient for rain. In the place of the mounting hole, the coating is thinner and easily scratched when tightening the screw, which will become a corrosion focus. This product is dedicated for inside building use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.
The inner hole diameter determines the maximum size of the mounting element. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.
It is a magnetic ring with a diameter of 20 mm and thickness 3 mm. The key parameter here is the lifting capacity amounting to approximately 3.14 kg (force ~30.79 N). The mounting hole diameter is precisely 8/4 mm.
These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. In the case of connecting two rings, make sure one is turned the right way. We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • Their strength is maintained, and after around 10 years it decreases only by ~1% (theoretically),
  • Magnets effectively resist against demagnetization caused by external fields,
  • In other words, due to the glossy finish of nickel, the element gains visual value,
  • Magnetic induction on the surface of the magnet remains maximum,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures approaching 230°C and above...
  • Considering the potential of accurate forming and adaptation to unique projects, NdFeB magnets can be modeled in a variety of geometric configurations, which makes them more universal,
  • Significant place in electronics industry – they are used in hard drives, electromotive mechanisms, medical devices, and complex engineering applications.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Limitations

Cons of neodymium magnets: weaknesses and usage proposals
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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 very resistant to heat
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Due to limitations in realizing threads and complicated shapes in magnets, we propose using cover - magnetic mount.
  • Potential hazard related to microscopic parts of magnets can be dangerous, if swallowed, which gains importance in the context of child safety. Additionally, small elements of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
  • Due to complex production process, their price exceeds standard values,

Lifting parameters

Highest magnetic holding force – what it depends on?

Breakaway force was determined for the most favorable conditions, taking into account:
  • with the use of a sheet made of special test steel, ensuring full magnetic saturation
  • with a thickness no less than 10 mm
  • with a surface cleaned and smooth
  • with zero gap (no impurities)
  • during pulling in a direction vertical to the plane
  • at temperature room level

Lifting capacity in real conditions – factors

Bear in mind that the magnet holding may be lower depending on the following factors, starting with the most relevant:
  • Clearance – the presence of foreign body (rust, tape, gap) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Base massiveness – too thin sheet causes magnetic saturation, causing part of the power to be escaped into the air.
  • Steel grade – the best choice is pure iron steel. Stainless steels may have worse magnetic properties.
  • Base smoothness – the more even the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
  • 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).

Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the holding force is lower. Moreover, even a small distance between the magnet and the plate decreases the holding force.

Precautions when working with NdFeB magnets
Medical interference

Life threat: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.

Keep away from computers

Very strong magnetic fields can destroy records on credit cards, HDDs, and storage devices. Maintain a gap of at least 10 cm.

Product not for children

These products are not suitable for play. Eating multiple magnets can lead to them attracting across intestines, which poses a critical condition and requires urgent medical intervention.

Threat to navigation

A strong magnetic field interferes with the functioning of magnetometers in smartphones and navigation systems. Do not bring magnets close to a smartphone to avoid damaging the sensors.

Allergy Warning

It is widely known that nickel (standard magnet coating) is a potent allergen. If you have an allergy, avoid direct skin contact or opt for encased magnets.

Physical harm

Big blocks can break fingers in a fraction of a second. Do not place your hand between two strong magnets.

Dust explosion hazard

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

Material brittleness

Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. We recommend safety glasses.

Heat sensitivity

Control the heat. Exposing the magnet to high heat will destroy its properties and pulling force.

Handling rules

Handle with care. Rare earth magnets act from a distance and snap with huge force, often faster than you can react.

Security! Learn more about hazards in the article: Magnet Safety Guide.