Patio Door Roller Assembly

This is a plain back tandem roller assembly with two 1-1/4 in. concave steel ball bearing rollers. The stamped steel housing is adjustable. Used by Milgard as well as a variety of other vinyl patio door manufacturers. The housing is 3/4 in. wide and 1 in. tall and 3-1/8 in. long with a threaded mounting hole on the back end and an optional use threaded holeon the top.