... Roller skate bearings,Insert bearings.Characteristic of SKF NSK TIMKEN HRB ZWZ ball bearing 6203zz 6208zz 6309zz Bearings1 ... .Seal form: open style, Z, ZZ, RS, 2RS, 2RZ2.Bearing stop ring: N, ... ,Z3,Z465.6.Internal elimination code: C0, C2, C3, C4, C57.Bearing material: bearing steel (9Cr18), ... ,607,608,609,6000,6001,6002.6004.6006SKF.NSK.NSK HRB ZWZ Bearings Model No. Dimension(mm) ...