Wraparound break-apart squirrel baffle for poles 1/2" to 1" diameter. Also 7/16" to 5/8" Square poles. Baffle Diameter is 17". 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.