1.ISO/TS16949:2002 certificate 2.OEM acceptable 3.Material: Gcr15 4.Retainer: nylon PA66 5.Usage: auto water pump Features of auto water pump bearings:1) Usage: auto water pump2) Material: Gcr153) Shield: 2RS4) Type: ball-ball & ball-roller5) Vibration and norse level: V2, V1, Z1, Z26) Tolerance: ABEC-1 (P0)7) Internal clearance: Co, C2, C38) Hardness: shaft-58-62HRC; ball & roller-61-65HRC; ...