This wraparound squirrel baffle with tan finish splits open on one side to fit a standard 4x4 post (3-5/8" x 3-5/8"). It is 22-1/2" in diameter. To close your squirrel baffle, slide the left tab into the right slot until they snap together. Corrosion resistant screws are provided to attach the baffle to your post. Installing a squirrel baffle on your post prevents squirrels and small raccoons from climbing or jumping up to the bird feeder or house. To keep squirrels from getting onto your bird feeder, place your post-mounted feeders 8-10' away from railings, roofs, trees, or other launching points. Squirrel baffles should be a minimum of 4' from the ground to protect the bird feeder. Erva squirrel baffles are made entirely in the U.S. Since they are made with galvanized steel, Erva baffles maintain their attractive appearance for years, and they carry an unconditional lifetime guarantee against defects in material and workmanship. Made with fully galvanized steel sheet purchased as excess to the auto industry in Detroit, this is the same galvanized steel used under the painted finish of new cars! The painted squirrel baffles, including the tan one, feature a baked on, highly corrosion resistant coating that will maintain its good appearance for years. Simply hose off the baffle occasionally, and it will look like new! Made in the USA.