... ,C3... Lily bearing is a specialized manufacturer of miniature ball bearing. Features:1),Shield / closure: Open,Teflon Sealed ... , C4, C55),Material: AISI52100, AISI440C, AISI304, AISI316, Ceramic6),Retainer: PTFE, Nylon, PEEK Or Stainless Steel7),Bore Size:from 1mm ... Rubber Seals Bearings Teflon Sealed Bearings Flanged Ball Bearings Thrust Ball Bearings Hybrid Ceramic Bearings Hybrid Ceramic Bearings