Easily operate any screen door with the Prime-Line back patio door roller assembly. It measures 13/16 in. wide, 1-3/16 in. tall and 1-1/2 in. long and has a 1/4-20 threaded mounting hole on the back. The tough nylon construction and steel finish make it as stylish as it is durable. Designed for use with Fleetwood, Fullview and other similarly-styled windows.