block magnets:strong performance, high coercive force, corrosion-resistant with good plating, no sharp edge. N35-N52 block strong magnets/cube neodymium magnetsCustomized NdFeB magnets with our advanced processing technology1. Quality Assurance ISO9001:2000, RoHS report by SGS, CP65 Certificate, Reach Certificate2. You decide the coating, shape, sizeSurface treatment: Ni, Zn, Epoxy, Gold, Silver, ...