Flat rate $10 SHIPPING saves you $$$ on larger orders! Stainless Steel Wire hanger on bird feeder is long lasting and chew proof. Metal die castings can't be chewed by squirrels. Powder coated finish won't chip or fade. UV stabilized polycarbonate tube won't yellow with age, dependably durable. Metal perches on bird feeder won't hurt birds' feet, can't be chewed by squirrels. Seed baffle keeps seed within reach of birds. Seed port size and design of bird feeder is ornithologically correct for birds. Distance from port to perch- ornithologically correct for birds. Threaded base allows addition of tray and other accessories. Best size for serious bird feeders.