WoodLink is the exclusive licensee for the manufacturing of birding products to the design specifications of the National Audubon Society. The ultimate 18-inch wrap around black metal squirrel baffler is made of textured powder coated steel. Installs easily. Raccoon resistant. Defeats squirrels every time. Mount 4 to 5-feet above the ground. 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.