They are zinc plated steel with ball bearing operation for long life, Outside diameter 110mm...

Nylon wheels with precision ball bearings and double steel hinges for rigidity and smooth, quiet ..

This drum helps keep the garage door balanced as it begins to open. Pictured to the top is the 5-..

Cup point set screw installed with red heads. For use with 1" tube shaft Diameter: 120mm ..

They are zinc plated steel with ball bearing operation for long life. Outside diameter 75mm. ..