Cylindrical roller bearings: 1.Single/double row, multi-row 2.Easy maintenance 3.Mini, small, medium,large 4.OEM Cylindrical roller bearings: Features:1,Structure: General,flanged,extended inner ring2,Shield / closure: Open,Teflon Sealed,Rubber Seals,2 Metal Shield3,Tolerance codes: ABEC-1, ABEC-3, ABEC-5, ABEC-7,ABEC-94,Vibration level codes: V4, V3, V2, V15,Internal clearance codes: C0,C2, C3, ...