Rollers for 4' tall windows from Home Depot circa ~1990
A quick learner from Tucson, AZ says:
October 22, 2022
Plastic housing has lip that rides on one edge of window. Length is 1 19/32", width is 19/32" excluding lip. Height is 11/32". Brass wheels: 9/32" wide and 3/8" diameter
Tom from SWISCO responded:
October 27, 2022
Your roller design is very similar to our 87-181, though our dimensions differ slightly. Look it over and see if you think you could still use it as a replacement.