Cylindrical squirrel baffle with a flat top and a open bottom, for poles 1/2' to 1-3/4" diameter. 16-3/4" long, 6-1/4" in diameter. To keep squirrels from getting to your bird feeders place at least 4 feet up the pole away from anything squirrels can jump from. Great baffle and good looking. Must be able to put take off feeders and hooks to put on a straight pole. Comes with ring to hold up the baffle on 1" pole.