... ball bearings 1.High quality 2.Reasonal price 3.Prompt delivery Deep groove ball bearings Deep Groove Ball Bearing Product NameDeep Groove Ball BearingDeep Groove ball ... ,32000 series,32200 series,32300 series.MaterialsCarbon steel,Stainless steel,Chrome Steel and Bearing steelSeals typeOpen,Z,ZZ,RS, ... they are:1,Inner and outer of rings and steel ball (the materials are GCr15)2,Cage(the materials are ...