... ,C0,C3... Lily bearing is a specialized manufacturer of small steel ball bearings.Features:1),Shield / closure: Open,Teflon Sealed,Rubber Seals ... ,C2, C3, C4, C55),Material: AISI52100, AISI440C, AISI304, AISI316, Ceramic6),Retainer: PTFE, Nylon, PEEK Or Stainless Steel7),Bore Size:from 1mm ...