... anti-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, ... ,Glod,Chrome,Ag,Au,Sn,etc.If you interested in any specification of magnet,pleast let me know,I ... to assist you. HR Brand NO.041 Anti-breakage Block magnet China