Prime Line 1-1/2 Inch Steel Roller Assembly D 1831

This is a plain back patio door roller assembly with a 1-1/2 in. concave or grooved steel ball bearing roller. The housing is 3/4 in. wide and 1-1/8 in. tall. It is rear adjusting with a 1/4-20 threaded mounting hole on the back end and an optional use 10-32 threaded hole on top. It is used by a variety of sliding patio door manufacturers.