Stainless Steel Shower Door Wheels 23mm Shower Door Rollers (2top +2bottom) - - Amazon.com
4PCS x Shower Door Rollers,Roller Diameter 19mm, for The Bathroom Pan Glass Sliding Door Pulleys/Runners/Wheels,Strong Load-Bearing Capacity, Ultra-Quiet,CY103-4PCS - - Amazon.com
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24mm Door Rollers For Ameristeam Shower | EAGO Parts.Com
4-Pack Sliding Shower Door and Tub Rollers, 3/4 inch Roller Diameter, for The Replacement of Sliding Glass Shower Door Rollers Runners Wheels, Ultra Quiet Ball Bearing, Threaded Hex Hub - - Amazon.com