... quality and price 3)has strong magnetic force Large Ring magnet N35,N38,N40,N42,N45,N48,N50,N52( ... ,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 ... here, welcome your inquiry, thanks. N50 large ring magnet