Prime-Line 1-1/2 in. Plastic Ball Bearing Sliding Door Roller, Harcar

This is a plain back patio door roller assembly with a 1-1/2 in. concave plastic ball bearing roller. It has a plain back housing that is 3/4 in. wide with a 7/8 in. flare, and is 1-9/16 in. tall. It is rear adjusting with a threaded mounting hole on the back end. It is used by Harcar and a variety of manufacturers of patio doors.