Cylindrical squirrel baffle for poles 1/2" to 1-5/8" diameter. 14-1/2" long, 7" 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. Having a squirrel baffle on your pole prevents squirrels and small raccoons from climbing or jumping up to the bird feeder. 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.