... ,6200,6300,6400,51100,51200,51300,51400,DAC,BC, etc. Ring MaterialChrome Steel ,Carbon steel,Stainless steel Tolerance gradeGB/T307.1 ... HuaJingRui bearing Co., LTD mainly Swedish SKF bearing, Japan NSK bearings, NTN bearing, KOYO bearing, IKO bearing, Germany FAG bearing, INA bearing, the United States TIMKEN bearing international ...