Bearing 6303-ZZ 1.low vibration,low noise 2.low friction moment 3.long ... different types of low noise,non-standard and special bearings.1.Bore diameter:3mm-50mm2.Bearing range:60series:606,607.608 ... 6206,6207,6208,6209,6210,6211,621263series:6300,6301,6302,6303,6304,6305,6306,6307,6308,6309,6310,6311,631267series:670568series ... ,motorcyles,power tools,sports goods,office appliance Ball Bearing 6303-ZZ