Droll Yankees Squirrel Proof Bird Feeder, Yankee Whipper Tube Feeder, 21-Inch, 4 Ports, Midnight Blue, YCWP-180 WEIGHT SENSITIVE SQUIRREL PROOFING: Weight sensitive collapsing perches send squirrels tumbling harmlessly to the ground while allowing birds to feed freely LARGE CAPACITY: 21 long clear UV stabilized polycarbonate tube with a hefty 5 pound seed capacity SQUIRREL RESISTANT: Heavy duty metal cap and base resist gnawing and chewing damage from squirrels LIFETIME WARRANTY: Droll Yankees stands behind the superb quality of our products with a lifetime warranty MADE IN THE USA: Designed, manufactured, and assembled in the USA