This is an diecast plain back patio door roller assembly with a 1-1/4 in. concave steel ball bearing roller. Its plain back diecast is 13/16 in. wide, 1-3/16 in. tall and 1-1/2 in. long. There is a 1/4-20 threaded mounting hole in the back end and a 10-32 threaded hole on top of the housing. Used by Fleetwood, Fullview and a variety of other patio door manufacturers. Color: Stainless Steel.