The Yankee Tipper’s 9in diameter, weight-sensitive feeding tray attracts ground feeding birds, but tips under the weight of a grey squirrel. Can hold the weight of up to four cardinals (about 8oz). The large tray also collects fallen seed and serves as a platform that allows multiple birds to feed simultaneously from the four seed ports. The heavy metal cap fits snugly on the tube to prevent squirrels from lifting it to reach the seed. The long, clear feeder tube makes the seed visible to the birds, a proven advantage. Made of UV stabilized polycarbonate, it ensures long lasting durability. Its length and girth are designed to prevent squirrels from reaching the seed ports. An internal baffle design keeps seed flowing freely to the ports.