... strong 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 ... temperature, as high as 200 centigrade1. Rare Earth neodymium permanent magnets grades of N35,N38,N40,N42,N45,N48,N50 ...