... and price 3)has strong magnetic force Large Ring magnet N35,N38,N40,N42,N45,N48,N50, ... N38,N40,N42,N45,N48,N50,gradeProduct specifications:1. Ring NdFeB magnet with different grades of: N35,N38, ... ,SH,UH,EH) etc.2. Working temperature for Ring shape NdFeB magnets:from 80 centigrades to 200 centigrades ... Cu-Ni,Epoxy, gold,silver and so on(as per the requirements).5. NdFeB magnet has super strong magnetic ...