January 24, 2018
3 inches high,1 1/4 in wide 1 1/16 offset doors are 1 3/8 I think it was an ACME because the only marking is on the backside and is a capital A inside a circle which I think may be trade mark for Acme.It has a cam device to adjust the height of the door from the floor.
January 25, 2018
made error in post above it is 1/16 offset not 1&1/16 roller 3/4 it is 3 inches tall and 1 1/4 wide and is for 1 3/8 doors has a capitol A inside a circle on the back maybe ACME???