Prime-Line 1-1/4 in. D X 0.31 in. L Nylon/Plastic Roller Assembly 1 pk

This is a plain back patio door roller assembly with a 1-1/4 in. concave or grooved nylon ball bearing roller. It has a plain back housing that is 5/8 in. wide and 1 in. tall with two mounting tabs/hooks on the top. It is rear adjusting with a 1/4-20 threaded mounting hole on the back end that holds it in place once the tabs/hooks are snapped into place in the door's bottom rail. It has a 3/4 in. flare It is used by Smith and Carry and a variety of other manufacturers of patio doors.