... 3.satisfactory of qulity,service and price 4.OEM service ball bearing low vibration,low noiselow friction moment,long service ... swiveling accuracyexcellent sealing performance Our main products include deep groove ball bearings, miniature thin-wall bearings, and different types of ... , Inch breadth widened bore3.Sealing form:OPEN,RS,2RS,Z,ZZ,RZ,2RZ,N,NR4.Material:Gcr155.Quality standard:ISO9001 ...