Ground-breaking new features never before seen on any bird feeder. The Squirrel Buster Plus features openings in the bottom section of the feeder that align with seed ports to allow access to birds. When a squirrel climbs onto the feeder, its weight automatically forces the shroud down, closing the seed ports. Constructed of rugged UV-filtered ABS and polycarbonate resins and powder coated aluminum components. The entire feeder can be disassembled by hand for cleaning, and will even fit in your dishwasher.