Prime-Line 7/8 in. Nylon Ball Bearing Roller (2-pack) 049793060020

Used for bathroom tub rolling doors
Non-handed for left or right sling doors
7/8 inch diameter roller
White plastic construction with binder screw
Threaded hex head hub
Two 8-32 x 3/8 inch long Phillips head machine screws included
Used by a variety of tub and shower door manufacturers