wholesale bearing distributors:1,ABEC-3,5;Z2V2,Z3V3 2,High speed 3,End cover:ZZ, ... RS 4,Noise level:Z1,Z2 Lily bearing is a specialized manufacturer of wholesale ... bearing distributors. Features:1),Shield / closure: Open,Teflon Sealed,Rubber Seals,2 Metal Shield 2),Tolerance codes: ABEC-1, ABEC-3 ... , ABEC-5, ABEC-7 3),Vibration level codes: V4, V3 ...