Plain back patio door roller assembly with a 1-1/2 in. Concave or grooved steel ball bearing roller. It is 3/4 in. Wide with a 27/32 in. Flare, 1-5/8 in. Tall and 1-1/2 in. Long (not including the inner roller housing). It is rear adjusting with a 1/4-20 threaded mounting hole on the back end. It is used by keller and a variety of other manufacturers of patio doors. Part# 13487
Number. 5000815