Aspects' Seed Tube Feeders combine heavy die-cast metal caps, ports, bases and a clear UV stabilized polycarbonate tube to make these feeders an investment that lasts a lifetime. A built-in seed deflector in the base allows birds to remove every last seed. Redesigned feed ports on the seed tube model have a raided ridge to divert rainwater and perches are part of the seed port. Comes in three sizes, Small, Medium and Large. All are 2-3/4" in diameter. Choose the size that suits your needs below the quantity box (Price is listed next to the feeder size).