You can find all the replacement parts you need at Escapa.
Union CB-131 MR20307 2RS 20x30x7 Ball Bearing
Features:
- Dimensions: 20x30x7
- 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
