1 1/4" single roller. 11/16 wide, approx 3" long. The assembly has bent out tabs at the wheel end about mid height. These tabs are small and increase width to about 7/8" The tabs locate the assembly in the door.
This sliding door is an old metal frame door from about 1974. Otherwise in fine condition.
Door glass is marked "Twindow". Door possibly may be made by Northrup. Not sure about Northrup.
