OE type fuel filter - US made
Among others this will fit most Autolite 1100/ 1101 carburetors. This fits directly into the Autolite 1100 that does not use the brass fitting. This fuel filter would screw into the inlet of the carburetor.
The Autolite 1100 fuel filter that fits into the type that has a brass fitting on the inlet you would use fuel filter 30-91
While the illustration shows 1/8", that is the inside diameter of the hole. The outside is 5/16"