... bearing from contamination in the application. 1.6000 Series - Extra Light Ball Bearings This series ... Shield / closure: Open ball bearing, Z, ZZ, RS, 2RS, 2RZ Ball bearings snap ring: N, NR Tolerance ... : With one or two side rubber seal RS, 2RS With one or two side metal ... , automotive, home appliances, industrial equipments... 7. Items Number: 6000, 6001, 6002, 6003, 6004, 6005, 6006, 6007, 6008 ...