So Unique and Functional, it’s Patented! This feeder is all metal, with red and brass color accents and three tiers. It features the wire mesh feeding system that attracts perching and clinging birds plus trough feeders. It is squirrel damage resistant and easy to clean and refill. Evenfeed Baffle design helps to retain feed in upper tiers until feeder is virtually empty. This allows more of the feeder surface to be useable, attracting more wild birds. No/No bird feeders collapse flat for shipping and storage, then flip open, ready for immediate use. No wood and no plastic – all metal construction. Large size holds 8.5 pounds of black oil sunflower seeds, or a sunflower/safflower mix, small size holds four pounds. Feeds 10-15 birds at once.