... H(mm) Coating:Zn.Ni.Nicuni,Gold,Ag,Epoxy.Passivation.. Magnetization: Yes or No High and stable Performance N48 HR Brand Permanent Cylinder High Performance ... N38, N40, N42, N48, N50, N52 (M, H, SH, EH, UH)Coating: Ni, Ni-Cu-Ni, ... cylinder and magnetic ring with various sizesHigh magnetic performance (Br: 11,000 to 14,500 GS, ... me at any time. N48 HR Brand Permanent Cylinder High Performance Ndfeb magnet