AbsoluteII Squirrel-Proof Bird Feeder has feeding ports on both sides. Features windows above the feeding stations. These clear, polycarbonate windows can't be damaged by squirrels. This feeder is constructed of steel. A squirrel's weight on the perch closes the seed ports. The closing mechanism is adjustable and can be set to close with the weight of large birds like grackles, starlings and morning doves. Baffles in the seed port help to reduce wasted seed. Large 2 gallon capacity. Package includes a heavy-duty hanger with snap-link WunderHook as well as a 4-section steel pole so the feeder can be hung or pole mounted.