1PK Prime-Line Sliding Door Tandem Roller Assembly

Tandem roller assembly used by several patio door manufacturers of metal or vinyl framed patio doors. It has an in-line tandem inner housing with 1-1/4 inch concave or grooved steel ball bearing rollers set in a stamped steel housing with rear adjustment. The housing is 1-1/32 inches tall 11/16 inches wide and 3-1/8 inches long with a 1/4-20 threaded mounting hole on the back end and and optional use hole on top.; This patio door roller is constructed from steel and has tandem wheels with a diameter of 1-1/4 in.It comes affixed to an adjustable steel housing assemblyThis roller is used by several patio door manufacturers;