Don't build or buy a feeder without a funnel. This steel 55-Gallon Funnel from Boss Buck is crucial in the proper function of your feeder. Funnels purge all feed materials from inside of your feeder barrel. This protects wildlife from ingesting tainted or moldy feed materials. They also keep you from needing to periodically clean the barrels. Preventing moldy feed residue from clogging and stopping your feeder from functioning is a must! Boss Buck funnels are one-piece spun, galvanized steel and built to last. Installs inside most 55 gallon metal and plastic drums possessing an inside diameter of 22.375'' or less.Manufacturer model #: 10.2. 20-gauge 1-piece galvanized steel construction Built in Downspout is 2'' I.D. x 1 _'' Long Measures 22.375'' O.D. x 7.75'' Deep