Keep squirrels away from your bird feeder and save seed! Weight sensitive collapsing curved perch feeder that supports birds and not squirrels. Features four seed ports with individual weight sensitive perches. Curved perch design encourages cardinals and small songbirds to eat, but prevents squirrels from feeding. Each perch is individually sprung and calibrated to collapse when approximately 2 oz. or more rests on the perch. Length and girth of the feeder are specific to repelling squirrels. The heavy metal cap is constructed to prevent squirrels from raising the cap and reaching the seed inside. An internal baffle design delivers the seed to the ports. The 4-3/4″ x 17″ clear feeder tube is made of UV stabilized polycarbonate for long lasting durability without yellowing. The metal cap and feeder base are powder coated. Hangs from a looped stainless steel wire that reduces motion that could spill seed. 5 pound capacity. 28.5" long.