... force Large Ring magnet N35,N38,N40,N42,N45,N48,N50,N52( ... M,H,SH,UH,EH Largest size:OD170mm Ring shape with hole High coercive forceNeodymium Ring Magnet with N35 ... ,N38,N40,N42,N45,N48,N50,gradeProduct specifications:1. Ring NdFeB magnet with different grades of: N35,N38,N40,N42,N45 ... ,transmission equipments...Features of NdFeB magnet :Neodymium magnets are mainly made ...