deep groove ball bearing with 72mm od :1,ABEC-3,5;Z2V2,Z3V3 2,High speed 3, ... a specialized manufacturer of deep groove ball bearing with 72mm od.Features:1),Shield / closure: Open,Teflon Sealed,Rubber Seals,2 ... :from 3mm to 30mmCurrently, our miniature bearings contains the following types, Metal Shield Bearings Open Bearings Rubber Seals Bearings Teflon Sealed ...