... noise Miniature bearings specifications:1) Shield / closure: Open bearing, Z, ZZ, RS, 2RS 2) Snap ring: N, NR 3) Tolerance codes: ABEC ... kgf)Dyn:21Stat:10RPM (x1000):63Shield / closure: Open Bearing, Z, ZZ, RS, 2RS,TTTolerance codes: ABEC-1, ABEC-3, ABEC-5, ABEC- ... -ZZ, MR85 ZZ, MR85ZZ, MR85 ZSSMR85-2RS, SSMR85 2RS, SSMR85 RS, SSMR85RS, SSMR85-ZZ, SSMR85 ZZ, SSMR85ZZ, SSMR85 Z MR85 mini ball bearing