Its weight-sensitive, motorized perch ring attracts the songbirds you love, but quickly spins to flip gray squirrels off. Send squirrels on a wild ride and keep them away from your bird feeder. The Yankee Flipper has a motorized perch ring that is specially calibrated to go off under the weight of a squirrel. The perch ring will accommodate bigger birds, like cardinals and woodpeckers, but squirrels will be promptly discharged. The clear 21in UV stabilized polycarbonate seed tube is too long and large in circumference for squirrels to navigate. The seed is only accessible from the ports around the perch ring. The clear polycarbonate helps you keep track of seed levels. A heavy, snug fitting cap sits firmly in place atop the feeder and can only be lifted by humans, not squirrels. The Flipper’s metal parts are powder coated in a lovely forest green that will resist chipping and fading.