The Squirrel Buster Classic is a value-priced, high quality bird feeder that is guaranteed 100% squirrel proof. It provides both a perching and clinging environment, disassembles easily for cleaning and features seed tube ventilation to keep seed fresher. This 1.4 quart feeder carries a 24 month warranty.
Feeder is surrounded by a moving cage of hard wire. When weight of squirrel hangs on perch or frame, the whole cage slides down, covering the feeder holes. Effective and best one I've had for the money. I've had this myself for one whole winter, and so far it still looks good!