countersunk magnet 1.Various kinds of Neodymium magnet 2.Ni, Zn, Cu...coating 3.we are manufacturer Magnet(NdFeB magnet) is made from Neodymium,Iron,Boron and some other transitive metallic elements to make it strong. General Features: Grades:N33,N35,N38,N40,N42,N45,N48,N50,N52, (M, H, SH, EH, UH )Coatings: Ni, Ni-Cu-Ni, Zn, white-blue Zn, Epoxy, Gold, and etc.Sizes: according to your ...