This caged tube feeer will keep squirrels predators and larger birds out allowing songbirds to dine in peace, The powder coated 1 1/2 inch grid will resist squirrel and weather damage while providing lots of perching room for smaller birds, Six ports with loop perches inside the cage provide plenty of room for several birds to feed at once, The metal dome on top serves as a roof for birds feeding in wet weather and helps to protect the polycarbonate tube and your seed from the elements, Measures 11 inches in diameter and 16, 5 inches high, Holds one quart of seed, Easily hang the feeder with the included hanger or mount to any 1"" pole -- no mounting bracket required, SKU: GC4886