Woodlink NABAF18 Audubon Wrap Around Squirrel Baffle, 18-Inch Made of textured powder coated steel Defeats squirrels every time No need to remove bird feeder when mounting Secure black coupler (included) around any 1/2-inch to 1-3/8-inch pole or shepherd hook Snaps apart with inward pressure on each side of the seam. Additional pieces that will hold the cover are tapped to the bottom of unit.