Yankee Flipper Squirrel Proof Bird Feeder --Sturdy stainless steel wire - will not rust. Metal powder coated cap fits snugly on tube - squirrels cannot pry off . 43/4 in. UV stabilized polycarbonate tube - won't yellow with age, dependably durable. 21-in. long tube - squirrels can't reach seed from the top of feeder. Interior baffle design - seed flows freely to seed ports. 4- seed port - provide optimum feeding positioning . Large capacity - holds 5 lbs. of seed. Motor driven, battery powered, weight activated perch ring . Unit comes equipped with rechargeable ni-cad batteries and a battery recharger. Weight calibrated to allow birds to eat, flips squirrels off. Powder coated in forest green. Advanced technology provides the ultimate experience. Hottest Selling bird feeder in the industry. Carries a lifetime warranty on the feeder and limited warranty on the motor and battery unit.