Product details:

Non-Typical 55 Gal. Poly-Lower Unit fits 55 gallon barrels, both metal and plastic. The unit has a 6" down spout. This unit is weather, rust, and leak proof. This maintenance free unit will provide years of trouble free use. This unit is built to be outside 24-7, 365 days! Extra deep funnel design adds feed capacity to your 55 gallon drum. 22 3/8" O.D. (Outside Diameter) on the funnel. Funnel without gravity head is 18 1/2" deep.