The Opus Top Flight Fortress Bird Feeder features a squirrel resistant design that provides small birds with a safe feeding haven. The 1inch, green coated, square fencing creates perching for several small songbirds while resisting squirrels and larger birds. Birds can reach their heads through the fencing but squirrels cannot. The feeder tube is made of durable plastic that is perfect for three quarts of nearly any seed. The 12 feeding ports provide plenty of stations for many birds to feed at once and the green metal cap lifts for easy cleaning and filling. The feeder base is equipped with drainage holes to prevent your seed from spoiling. This chew and rust resistant feeder may be hung using the included green wire hanger and comes with a manufacturer's lifetime guarantee.