This Tub and Sliding Shower Door Roller has a 3/4 inch (19.1 millimeter) diameter flat edge nylon ball bearing roller with 8-32 threaded hex hub. This shower door roller is used by several shower door manufacturers.
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Finish/Color: White
Diameter: 3/4 in. (19 mm)
Roller Thickness: 1/4 in. (6 mm)
Style: Flat Edge