4x13x4mm U604ZZ U-Groove Guide Wheel Pulley Bearing
This is a U-groove ball bearing with a bore diameter of 4mm. U-Grooved track Wheels are designed for easy rolling along straight or curvy tracks or pipes.
These bearings are pre-lubricated with grease.
- Bore diameter: 4mm
- Outer diameter: 13mm
- Width: 4mm
- Sold by the unit.