A premium product for a lifetime of peaceful bird feeding. Our largest-capacity model, the Squirrel Buster® Plus squirrel-proof bird feeder is also our most popular. Measuring 28” tall from base to hanger, the Squirrel-Buster Plus holds a whopping 5.1 lbs of birdseed and features our patented Cardinal Ring System™. Fully weight adjustable, you can fine-tune your feeder to exclude larger birds. Truly Squirrel Proof: When a squirrel climbs onto the feeder, its weight automatically forces the shroud down, closing access to the ports. Chew Proof: All feeder parts exposed to squirrels are made with chew proof materials. Detachable Component System: Squirrel Buster® squirrel-proof bird feeders are designed to be dismantled by hand into individual components without the use of tools. Seed Ventilation System: Transparent seed tubes allow for the capture of solar energy while conventional designs hinder the release of heated air. UV Resistant: All components are UV resistant. Weight Adjustable: Patented weight adjustable spring mechanism controls how much weight the shroud will support allowing the birds to feed.