... disc magnets NdFeB 1.disc magnets NdFeB 2.All grades 3.custom ring,cylinder,disc,block,tile,ball... 4.sta Neodymium magnets are ... mainly made from neodymium ,iron, and boron. It is the ideal magnetic ... working temperature, as high as 200 centigrade1. Rare Earth neodymium permanent magnets grades of N35,N38,N40,N42,N45,N48,N50,N52 ...