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 4 million very happy customers have confirmed it.; Patented weight adjustable closing mechanism shuts out squirrels as well as some heavier undesirable birds. features a patented seed ventilation system that keeps seed fresher. Both perching and clinging footholds increase bird activity.; Chew-proof components stop annoying squirrel damage.; Detachable Component System for easy cleaning, filling and servicing.; Stainless steel perches and hanger.; UV stabilized components. Comes with Lifetime Care.