Super high quality round NdFeB magnet with hole:
1. Material:Sintered Neodymium-Iron-Boron.
2. Excellent strength value: the highest (BH)max reaches up to 51MGOe
3. Extremely Resistance to demagnetization with Hci,the intrinsic coercive force is over 30000Oe.
4. Moderate temperature stability: under 80°C for low Hci NdFeB magnet and above 200 °C for high Hci NdFeB magnet.
5. Grade: N35~52(N,M,H,SH,UH,AH)
6. Coating: Effective Surface treatment to prevent corrosion, such as Nickel, Ni-Cu-Ni co, Zinc, gold, silver, tin(Sn), epoxy, chemical, parylene, etc.