Bearing 6303-ZZ 1.low vibration,low noise 2.low friction moment 3. ... ,16002,16003,16005,160073.Sealing form:OPEN,RS,2RS,Z,ZZ,RZ,2RZ,N,NR4.Material:Gcr155.Quality standard:ISO9001:20006 ... ,motorcyles,power tools,sports goods,office appliance Ball Bearing 6303-ZZ