The Bird Feeder Tube - Executive Tubular, by Droll Yankee, has a large capacity to feed a lot of birds for days. This bird feeder has the following features: Stainless steel wire - 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 - won't hurt bird's feet, can't be chewed by squirrels; Seed baffle - keeps seed within reach of birds; Seed port size and design - ornithologically correct for birds; distance from port to perch - ornithologically correct for birds; Threaded base - attach Seed Tray 7-1/2" or Omni Seed Tray to catch seed, attract more variety of birds, and to provide extra room for birds.; The Executive Tubular 30” Feeder has a length of 30”, diameter 3.5”, capacity of 4 lb., and 12 ports. Made in the USA. See below for quantity discounts.