Magnetisation Grade:         N50
Material: Neodymium-Iron-Boron (NdFeB)
Magnet ID:              NR-2047-N50
Plating / Coating:  Nickel (Ni-Cu-Ni) / Double Ni / Zinc (Zn) / Epoxy (Black/Gray) / Gold (Au)       
Shape:         Ring  
Ring Magnet Size: 
Ring Total Diameter (D):       20 mm
Ring Inner Diameter (d):       4 mm
Ring Total Height (H):         7 mm
Tolerance:         ±0.05 mm
Magnetisation Direction:    Axial  /  Radial   
Residual Magnetic Flux Density (Br): 1400-1450 mT (14.0-14.5 kGs)
Energy Density (BH)max:             382-406 KJ/m³  (48-51 MGOe) 
Coercivity Force (Hcb):              ≥ 796 kA/m ( ≥ 10.0 kOe)  
Intrinsic Coercivity Force (Hcj):    ≥ 876  kA/m ( ≥ 11 kOe)   
Maximum Operation Temperature: 60 °C 
Delivery Time:           14-35 days   

God created the universe from noting and organized it with the help of a MAGNET.NdFeB magnet is widely used in motor,speaker
Product briefs:
Grade available: all grades from N30 to 30EH,specialized in high grade
Coating: Zn,Ni,Epoxy,Cr,ZnC,gold,etc.
Certificate: ISO/TS16949,ISO14001,ISO9002
Performance test: salt spray test ,metallographic analysis microscope ,PCT test Micron tester,etc.
Performance:high flux, high coercive force, low temperature coefficient and low loss of irreversible.
FREE SAMPLES can be sent on request. Looking forward to your enquiry!
Type: Permanent  Composite: NdFeB Magnet  Shape: ring  Application: Speaker Magnet