... ,N40,N42,N45,N48,N50 1.shape:ring 2.neodymium permanent magnet 3.nickel,gold coating 4.application:jewelry Specification1) NdFeB ... .8mm white cartonFunctionindustrialPaymentsTT/Western unionmore details about NdFeb magnets: NdFeB permanent countersunk hole magnet with N42 Grade zinc,nickel coating