BOSS BUCK 3 WAY GRAVITY HEAD FOR DEER GAME FEEDER The Protein Gravity Head has 8" ports with 4" I.D. openings for a deer's muzzle. Accommodates the largest whitetail. With our Patented Protein/Gravity Head you get the most moisture resistant free choice feeding system available on the market today! Our patented design features an internal cone that dispenses the feed evenly to the three feed ports. The adjustable height inner sleeve allows the user to control the feed flow of almost all feed shapes and sizes. Push it all the way up to virtually shut off the flow, or ease it down until you get the optimal flow on your favorite type of critter food. Center connecting tube is 4" I.D & 4 3/8" O.D. Feed ports are 8" long. Note: Remove the protein head when not in use / empty. Residue from corn/feed causes squirrels to chew on the unit when it's empty. Specially designed for feeders with 3 legs. MAIN FEATURES: - Feed tubes have 10 degree Angle; - Feed tubes have 1" overlap on top of each Port; - Feed ports are 8" long and 4" I.D.; - Each Port has a drain hole.