... -breakage and anti-corrotion If you are interested in NdFeB block magnet,please tell us the information as follows,1.Material:Sintered ... Neodymium magnet2.Size:Such as block magnet,LxWxT3.Grade:N30-N52,N30M-N48M,N30H-N45H,N30SH-N42SH ... ,Au,Sn,etc.If you interested in any specification of magnet,pleast let me know,I would like to assist you ...