This 1-1/2 inch plain back tandem roller assembly is designed for Keller vinyl patio doors and compatible with a variety of other sliding door manufacturers. It features two concave (grooved) steel ball bearing rollers in a durable stamped steel housing with rear adjustment for precise alignment. The housing measures 11/16 inch wide, 1 inch tall, and 3-1/8 inches long, with a 1/4-20 threaded mounting hole on the back and a stabilizing tab on top for secure installation. Perfect for DIY homeowners or contractors, this assembly restores smooth, quiet operation and long-lasting performance to your sliding doors.
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