... deep groove ball bearing with 72mm od.Features:1),Shield / closure: Open,Teflon Sealed,Rubber Seals,2 Metal Shield2), ... , AISI440C, AISI304, AISI316, Ceramic6),Retainer: PTFE, Nylon, PEEK Or Stainless Steel7),Bore Size:from 1mm to 10mm8),Outside ... Open Bearings Rubber Seals Bearings Teflon Sealed Bearings Flanged Ball Bearings Thrust Ball Bearings Hybrid Ceramic Bearings Hybrid Ceramic Bearings