This Droll Yankees 4-Port Sunflower Bird Feeder is a squirrel-proof haven for cardinals featuring 180-degree, weight-activated collapsible perches. Made of durable polycarbonate, it hangs securely from a sturdy stainless steel wire hanger that won't rust. The metal cap fits snugly preventing squirrels from prying it off. The 4.5 Inch diameter seed tube is U.V. stabilized for long-lasting use. Its interior is baffled to direct seed to the four feeding ports, and the metal parts are finished in a beautiful evening blue. With a 5-lb. seed capacity, this 21 Inch long tubular feeder attracts a variety of birds, including cardinals, while discouraging squirrels.