If you're involved in a battle of wits with a squirrel, then this Squirrel Proof Seed Feeder is for you. It's guaranteed to defeat the most determined of bird feed raiders. It has a simple yet very effective mechanism that uses gravity to protect feeder contents. When the squirrel approaches from above and attempts to climb on to the feeder, the body weight of the animal lowers a protective sleeve, which covers the feed. The seed feeder has two ports and two perches with a clear polycarbonate tube. Made of high strength and quality construction, the feeder is manufactured from stainless steel and aluminum, the sharp teeth of a squirrel do not stand a chance. There is a strong steel hanger and suspension clip. Holds approx 1qt of Seed.