... 2,popular on us market 3,strong manufacturing capability inch ball bearing 1633Features:1),Shield / closure: Open,Teflon Sealed,Rubber Seals,2 ... codes: V4, V3, V2, V14),Internal clearance codes: C0,C2, C3, C4, C55),Material: AISI52100, AISI440C, AISI304, AISI316, Ceramic6),Retainer: PTFE ... 1mm to 10mm8),Outside Diameter:from 3mm to 30mm inch ball bearing 1633