Product Description professional ndfeb magnetic materials wholesale 1.Grade:N33, N35, N38, N40, N42, N48, N50, N52 (M, H, SH, EH, UH,AH)2.Shape:Disc, Ring, Block, Segment, Cylinder, Trapezoid, Customized Design (Design proper magnets for clients specific requirements) 3.Coating:Ni, Ni-Cu-Ni, Zn, Tin, Epoxy, Ni-Ag, Ni-Au, etc. ..