... propeties 2.Various shaped:ARC,Round,Block,Ring,etc 3.Grade:N35 to N52,M,H,SH,UH,EH,AH,etc ... 4.RoHS,SGS Sintered NdFeB magnet 1.Certificate:TS16949,ISO,SGS2.Grade:N33-N52 33H-35EH and so on ... up to 200 degree centigrade or 380 curie temperature; 3. Grade:N33-N52,33M-48M,33H-48H,30SH-45SH,30UH-38UH ...