A 4 ounce Flint Glass Mooney Air Vent Funnel. The Mooney Funnel is marked "Mooney Air Vent" and "Made in USA" on one rim and "4 oz" on the other side of the rim. The Flint Glass Mooney Air Vent Funnel stands 4 1/4 inches tall and has a top diameter of 3 1/2 inches. The funnel has ribbing on the inside. It is in very good condition with only one small flea bite on the inside of the rim, I can't see it but I can feel it.