... bore size. 4. Features: Shield / closure: Open ball bearing, Z, ZZ, RS, 2RS, 2RZBall bearings snap ring: N, NRTolerance code: ABEC ... RS, 2RSWith one or two side metal shields Z and ZZ (2Z)With a snap ring groove in outer ring NWith ... , 6403, 6404, 6405, 6406, 6407, 6408, 6409, 6410, 6411, 6412 - ZZ or 2RSIf you are interested in our any products,pls ...