... ,N50M,etc b): 21 years production experience c): coating can be NI,Epoxy,Zn etc Details about our neodymium magnet:a/ Our ... to customer's request.c/ Coating: Ni, NiCuNi, Zn, Blie Zn,Color Zn, Zn3+Cr, gold, sliver, epoxy, phosphate, passivate.d/ Grades ... free production process.2/ Good coating control, PCT can reach 7 days for NICUNI.3/ Oxygen contain for our material less than 3 ...