Magnetisation Grade:         N35
Material: Neodymium-Iron-Boron (NdFeB), Neodymium and Steel 
Magnet ID:              NCD-742-N35
Plating / Coating:  Nickel (Ni-Cu-Ni) / Double Ni / Zinc (Zn) / Epoxy        
Shape:         Disc with Countersunk Hole (countersink hole)   
Countersunk Magnet Size: 
Disc Total Diameter (D):      7 mm
Disc Total Height (H):        4 mm
Small Hole Diameter (d):      2 mm
Tolerance:         ±0.05 mm
Magnetisation Direction:    Axial /  Radial
Residual Magnetic Flux Density (Br):  1170-1220 mT (11.7-12.2 kGs)
Energy Density (BH)max:              263-287 KJ/m³  (33-36 MGOe)
Coercivity Force (Hcb):              ≥ 868 kA/m ( ≥ 10.9 kOe)   
Intrinsic Coercivity Force (Hcj):   ≥ 955  kA/m ( ≥ 12 kOe)   
Maximum Operation Temperature: 80 °C 
Delivery Time:           14-35 days   
Disc Countersunk NdFeB Magnet, Disc Countersunk Magnet, Powerful NdFeB Disc with Countersunk, Sintered NdFeB Disc with Countersink, Neodymium-Iron-Boron Disc with Countersunk

countersunk ndfeb magnet are Neodymium Iron Boron (Nd-Fe-B) or Neodymium magnet
Countersunk ndfeb magnet  are extremely strong for their size. Shapes include rings, blocks, discs and custom. To prevent unwanted oxidation, neodymium magnets are usually finished with zinc, nickel or epoxy coating.
NdFeB magnets can be manufactured by sintering, compression bonding, injection molding, and extrusion. The sintered form holds the highest energy product of up to 48MGOe, while the bonded form holds a lower energy product of up to 10MGOe. The majorities of NdFeB magnets are anisotropic and can only be magnetized in the orientation direction. In general, magnetizing fields of approximately 30KOe are required to saturate NdFeB magnets.