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neodymium magnets

We offer yellow color magnets Nd2Fe14B - our store's offer. Practically all magnesy in our store are in stock for immediate delivery (check the list). See the magnet pricing for more details see the magnet price list

Magnets for fishing F300 GOLD

Where to purchase very strong magnet? Magnet holders in airtight, solid enclosure are excellent for use in difficult weather, including snow and rain see...

magnetic holders

Magnetic holders can be used to improve manufacturing, underwater exploration, or locating meteorites made of metal see more...

Order always shipped on the same day before 2:00 PM on working days.

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UI 33x13x4 [C311] / N38 - badge holder

badge holder

catalog number 150207



33 mm [±0,1 mm]


13 mm [±0,1 mm]


4 mm [±0,1 mm]

capacity ~

1.80 kg / 17.65 N

max. temperature

≤ 80 °C

2.52 PLN gross price (including VAT) / pcs +

2.05 PLN net price + 23% VAT / pcs

bulk discounts:

need more quantity?

price from 1 pcs
2.05 PLN
2.52 PLN
price from 150 pcs
1.93 PLN
2.37 PLN
price from 450 pcs
1.80 PLN
2.21 PLN
price from 900 pcs
1.74 PLN
2.14 PLN

Don't know what to buy?

Call us tel: +48 888 99 98 98 or get in touch via contact form on the contact page. You can check the strength as well as the appearance of neodymium magnet in our force calculator force calculator

Orders placed by 2:00 PM will be shipped on the same business day.

Specification: badge holder 33x13x4 [C311] / N38

Characteristics: badge holder 33x13x4 [C311] / N38
catalog number
production / distribution
Dhit sp. z o.o.
country of origin
Poland / China / Germany
customs code
33 mm [±0,1 mm]
13 mm [±0,1 mm]
4 mm [±0,1 mm]
capacity ~ ?
1.80 kg / 17.65 N
max. temperature ?
≤ 80 °C
0.21 g
execution tolerance
± 0.1 mm

Magnetic properties of the material N38

material characteristics N38
remenance Br [Min. - Max.] ?
remenance Br [Min. - Max.] ?
coercivity bHc ?
coercivity bHc ?
actual internal force iHc
≥ 12
actual internal force iHc
≥ 955
energy density [Min. - Max.]
BH max MGOe
energy density [Min. - Max.]
BH max KJ/m
max. temperature
≤ 80

Physical properties of sintered neodymium magnets Nd2Fe14B

Physical properties of sintered neodymium magnets Nd2Fe14B
Vickers hardness
Curie Temperature TC
312 - 380
Curie Temperature TF
593 - 716
Specific resistance
Bending strength
Compressive strength
Thermal expansion parallel (∥) to orientation (M)
(3-4) x 106
Thermal expansion perpendicular (⊥) to orientation (M)
-(1-3) x 10-6
Young's modulus
1.7 x 104
The most recommended mountings for ID badges include options such as this UI 33x13x4 [C311] / N38. They offer durability and an aesthetic appearance. Magnetic holders are acknowledged as the best because they are gentle on clothing, are simple to mount, and provide secure badge attachment. A model using efficient neodymium magnets and high-quality adhesive tapes, such as 3M tape, is particularly suggested.
No!, magnetic holders are contraindicated for individuals with cardiac pacemakers, as the strong magnetic field may interfere with their functioning. For such individuals, it is suggested to use clip-on holders, and we offer two such types in our range.

Find suggested articles

Advantages as well as disadvantages of neodymium magnets NdFeB.

Apart from immense strength, neodymium magnets have the following advantages:

  • They do not lose their strength (of the magnet). After about 10 years, their strength decreases by only ~1% (theoretically),
  • They are exceptionally resistant to demagnetization caused by an external magnetic field,
  • In other words, thanks to the shiny coating of nickel, gold, or silver, the element acquires an aesthetic appearance,
  • They have very high magnetic induction on the surface of the magnet,
  • By using an appropriate combination of materials, they can achieve significant thermal resistance, allowing them to operate at temperatures up to 230°C and above...
  • The ability for precise shaping and customization to specific needs – neodymium magnets can be produced in a wide range of shapes and sizes, which enhances their versatility in applications.
  • Significant importance in the industry of new technologies – are utilized in computer drives, electric drive mechanisms, medical devices and very highly developed apparatuses.

Disadvantages of neodymium magnets:

  • They can break as they are fragile when subjected to a powerful impact. If the magnets are exposed to impacts, we recommend using magnets in a steel housing. The steel housing in the form of a holder protects the magnet from impacts and simultaneously increases its overall strength,
  • Magnets lose their strength due to exposure to high temperatures. In most cases, when the temperature exceeds 80°C, these magnets experience permanent loss in strength (although it is worth noting that this is dependent on the shape and size of the magnet). To avoid this problem, we offer special magnets marked with the [AH] symbol, which exhibit high temperature resistance. They can operate even at temperatures as high as 230°C or more,
  • Due to their susceptibility to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic, or other moisture-resistant materials when using them outdoors,
  • Limited ability to create threads or complex shapes in the magnet - the use of a housing is recommended - magnetic holder
  • Health risk arising from small pieces of magnets pose a threat, in case of ingestion, which is particularly important in the aspect of protecting young children. It's also worth noting that miniscule components of these magnets can be problematic in medical diagnosis in case of swallowing.

Exercise Caution with Neodymium Magnets

Neodymium magnets can demagnetize at high temperatures.

Despite the fact that magnets have been found to maintain their efficacy up to temperatures of 80°C or 175°F, it's essential to consider that this threshold may fluctuate depending on the magnet's type, configuration, and intended usage.

Neodymium magnets are extremely fragile, leading to breaking.

Neodymium magnetic are delicate as well as will crack if allowed to collide with each other, even from a distance of a few centimeters. They are coated with a shiny nickel plating similar to steel, but they are not as hard. At the moment of collision between the magnets, small sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. Once crushed into fine powder or dust, this material becomes highly flammable.

Never bring neodymium magnets close to a phone and GPS.

Strong fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

  Do not give neodymium magnets to children.

Neodymium magnets are not toys. Be cautious and make sure no child plays with them. Small magnets can pose a serious choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing severe injuries, and even death.

Magnets will attract to each other, so remember not to allow them to pinch together without control or place your fingers in their path.

Neodymium magnets bounce and also clash mutually within a radius of several to around 10 cm from each other.

Keep neodymium magnets away from TV, wallet, and computer HDD.

Magnetic fields generated by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other similar devices. They can also damage televisions, VCRs, computer monitors, and CRT displays. You should especially avoid placing neodymium magnets near electronic devices.

Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times more powerful, and their strength can shock you.

On our website, you can find information on how to use neodymium magnets. This will help you avoid injuries and prevent damage to the magnets.

The magnet is coated with nickel. Therefore, exercise caution if you have an allergy.

Studies clearly indicate a small percentage of people who suffer from metal allergies such as nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

Keep neodymium magnets away from people with pacemakers.

Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This is because many of these devices are equipped with a function that deactivates the device in a magnetic field.

So you are aware of why neodymium magnets are so dangerous, read the article titled How very dangerous are powerful neodymium magnets?.

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tel: +48 888 99 98 98