... and price 3)has strong magnetic force Large Ring magnet N35,N38,N40,N42,N45,N48, ... N40,N42,N45,N48,N50,gradeProduct specifications:1. Ring NdFeB magnet with different grades of: N35,N38 ... ,UH,EH) etc.2. Working temperature for Ring shape NdFeB magnets:from 80 centigrades to 200 ... used in electronics, aviation, motors, automobiles, medical apparatus,transmission machine... and even in many details of our ...