This is a diecast plain back patio door roller assembly with a 1-1/4 in. Concave nylon ball bearing roller it's diecast plain back housing is 11/16 in. Wide, 1 in. Tall and 2-5/8 in. Long. The adjustment screw is in the back end. There is a 1/4-20 threaded mounting hole in the back end. Part# d1587
Number. 5000270