6301 2RS Roller bearing . High precision , low noise, high durability, long life. 6301 2RS Roller bearingHigh precision, low noise, high durability , long ... Cixi, Zhejiang, China.Tolerance: ABEC-1; ABEC-3; ABEC-5;Vibration: Z1V1;Z2V2; Z3V3;Certificate: RoHS, ISO9001:2008;Production Range ... 6303, 6304, 6305, 6306, 6307. 6308, 6309, 6310;Production Ability: 5,000,000PCS/Month; 6301 2RS Roller bearing