... good plating, no sharp edge. N35-N52 block strong magnets/cube neodymium magnetsCustomized NdFeB magnets with our advanced processing technology1. Quality ... +Cu+Ni and Cr3+ZnSize available: 0.5-150mmShape: Block, Square, Disc, Cylinder, Ring, Rod, Bar, Stick, Tile, Fan, Ball3. Competitive ... with esteemed OEM!! neocube magnets/N35-N52 block strong magnets/cube neodymium magnets