... quantity: 100pcsremarks: other size and shape customs Material Grade of rare earth magnet1 Magnet NN35, N38, N40, N42, ... also very good, cutting different shapes and bored. High-performance products of the highest temperature of up to 200 degrees Celsius ... material content easily lead to corrosion, according to different requirements of different surface coating. (Such as plating Zn, Ni, Au, Epoxy, ...