LIFETIME CARE: you only need to buy one of our products, and we will guarantee to service your feeder for free for the rest of your life! TRULY SQUIRREL PROOF: the weight of an adult squirrel automatically closes the shroud denying access to seed. NON-ADJUSTABLE NEED FOR CLEARANCE: hang providing an 18-inch/47-cm CLEARANCE on all sides. CHEW PROOF: all feeder parts exposed to squirrels are made of chew proof materials. NO TOOLS REQUIRED: our feeders are designed to be dismantled by hand into individual components without the use of tools. SEED VENTILATION SYSTEM: our patented Seed Ventilation System keeps the seed fresh longer attracting more wild birds. 4.4"x4.4"x21" (w/hanger)