small low friction bearing:1,ABEC-3,5;Z2V2,Z3V3 2,High speed ... ,C3... Lily bearing is a specialized manufacturer of small low friction bearing. Features:1),Shield / closure: Open,Teflon Sealed,Rubber Seals ... -5, ABEC-73),Vibration level codes: V4, V3, V2, V14),Internal clearance codes: C0,C2, C3, C4, C55),Material: AISI52100, AISI440C ...