The new Squirrel Buster Standard raises the standard in everything a wild bird feeder should be. Here's why: Award-winning Squirrel Buster technology is truly squirrel-proof. Over 1 million very happy customers have confirmed it.; Patented weight adjustable closing mechanism shuts out squirrels as well as some heavier undesirable birds.; Seed Saver Technology eliminates seed losses to pilfering squirrels. These savings alone pay for the feeder.; Seed Tube Ventilation keeps seed fresh.; Both perching and clinging footholds increase bird activity.; Chew-proof components stop annoying squirrel damage.; Detachable Component System for easy cleaning, filling and servicing.; Dishwasher safe for total sanitizing.; Stainless steel perches and hanger.; UV stabilized components.