Product Details:

Used for Tub Enclosures and Sliding Shower Doors
8-32 Threaded Hex Hub

This CRL Sliding Shower Door Roller features a 7/8 inch (22.2 millimeter) "V" edge nylon wheel with steel ball bearing inner-race with 8-32 threaded hex hub.

Wheel Diameter:  7/8 in (22.2 mm)
Wheel Thickness: 9/32 in (7.1 mm)

Minimum Order: 1 Package
Two rollers and installation screws per package.