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.; 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.; Stainless steel perches and hanger.; UV stabilized components. Lifetime Care.