Magnetisation Grade:         N48
Material: Neodymium-Iron-Boron (NdFeB), Neodymium and Steel 
Magnet ID:              NCR-8020-N48 
Plating / Coating:  Nickel (Ni-Cu-Ni) / Double Ni        
Shape:         Ring with Countersunk Hole (countersink hole)   
Countersunk Magnet Size: 
Ring Total Out-Diameter (D):       80 mm
Ring Total Inner-Diameter (d):      20 mm
Ring Total Height (H):         15 mm
Small Hole Diameter (d1):      7 mm
Tolerance:         ±0.05 mm
Magnetisation Direction:    Axial  /  Radial   
Residual Magnetic Flux Density (Br): 1380-1420 mT (13.8-14.2 kGs)
Energy Density (BH)max:             366-390 KJ/m³  (46-49 MGOe) 
Coercivity Force (Hcb):              ≥ 923 kA/m ( ≥ 11.6 kOe)  
Intrinsic Coercivity Force (Hcj):    ≥ 876  kA/m ( ≥ 12 kOe)   
Maximum Operation Temperature: 80 °C 
Delivery Time:           14-35 days 

All the Pot Magnet types can be used for ambient temperature indoor applications where moisture content is low or negligible. NdFeB Pot Magnets are best for maximum pull strength with a small size. Ferrite Pot Magnets can be used for corrosion resistance, marine, low cost and higher temperature applications. Alnico Pot Magnets can be used in higher temperature applications and where the pull force needs to change as little as possible with temperature variation. Alnico Pot Magnets can also be used in corrosion resistance applications. SmCo Pot Magnets can be used for extreme temperature applications and marine / corrosion resistance applications.