You can find all the replacement parts you need at Escapa.
Union CB-074 6901 2RS 12x24x6 Ball Bearing
Features:
- Dimensions: 12x24x6
- Outer and inner rings: CrMO
- Balls: CrMO (HRC 61-66)
- Cage: Steel
- Seals: 2RS rubber (light contact)
- Grease: MULTEMP SRL (Kyodo Yushi)
- Tolerance: ABEC-3