Unique squirrel proof feeder keeps squirrels off in 4 different ways 1) Double wall design with weight sensitive outer tube drops down to block seed ports. 2) A smooth durable polycarbonate outer tube prevents squirrels from gripping and hanging from the feeder body. 3) Spring-loaded perches collapse under the weight of squirrels, preventing them from becoming a foothold for the squirrels. 4) Large metal dome-shaped roof acts as a built-in baffle the help prevent squirrels from reaching feeding ports and accessing seed. Unlike other squirrel proof feeders, this feeder features Easy Clean technology allows feeder to be easily dissassembled for cleaning. This feeder includes thistle inserts to allow it to be used to feed a wider variety of seed.