Save your seed for the animals you want to feed! The Whipper features four seed ports with individual weight sensitive perches. The curved perch positioning encourages cardinals and small songbirds to eat but prevents squirrels from feeding. Each perch is individually sprung and calibrated for birds up to the weight of a cardinal (approx. 2oz). This feeder has a capacity of 5lbs of bird seed. More Details 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. The 4-3/4" x 21" clear feeder tube is made of UV stabilized polycarbonate for long lasting durability without yellowing. The Whipper hangs from a looped stainless-steel wire that reduces motion that would spill seed. Add a Locking Chain to secure it against falls. Lifetime Warranty against squirrel damage. Attracts Goldfinch, Blue Jay, Bunting, Cardinal, Wren, Chickadee, Grosbeak, Finch, Nuthatch, Tufted Titmouse, and more. (The species of birds attracted to this feeder may vary based on your location. Take our Bird Seed Selector Quiz to learn which seed types may be best for your region.) Recommended Seed Types The feeder can hold a multitude of different types of seed, but these are our recommended selections: Sunflower Seeds Size Information Weight: ~5lbsCapacity: 5lbs of bird seedDimensions: (W x L x H): 8.75” x 8.75” x 28"Vendor: Droll Yankees