Wraparound break-apart squirrel baffle for poles 1/2" to 1" in diameter. 22-1/2" in diameter. To keep squirrels from getting onto your bird feeder, place your pole-mounted feeders 8-10' away from railings, roofs or trees. Squirrel baffles should be a minimum of 4' from the ground to protect the bird feeder. To close your baffle, slide the left tab into the right slot until they snap together. Place the included metal collar under the baffle to support it. The mounting collar is as important as the baffle shield itself! An all metalupport collar with instructions is included. Ordinary baffles include substandard - and in some cases plastic collars. The collar must hold the baffle securely in place - and it must not be plastic. Plastic collars can and will be chewed through. Installing a squirrel baffle on your pole prevents squirrels and small raccoons from climbing or jumping up to the bird feeder or house. Erva squirrel baffles are made entirely in the US. 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. All Erva squirrel baffles are 100% USA made in our factory in Chicago. Our painted Squirrel Baffles feature 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!