Premium Material - - The squirrel proof spring is made of metal, not easy to rust, suitable for outdoor, smoothly polished, without burrs, will not harm small animals, and can be used for a long time. .Good Elasticity - - The anti-squirrel spring has good toughness and can still return to its original shape after repeated stretching. When the squirrel climbs up along the spring, it will move downward due to gravity, thus achieving the effect of staying away from the bird feeder. .Easy to Install - - Fix the top of the large metal walking spring on the top of the feeder with a ribbon, rope or hook, and then wind the remaining springs around the feeder rod to complete the installation. .Large Size - - The diameter of the squirrel proof wild bird feeder is 6.5cm/2.56inches, and the height when placed on the desktop is 5.2cm/2.04inches. The high elasticity allows squirrel guard for bird feeders to be extended to a sufficient length and easily connected to the bird feeder rod or hook. .Bird Feeder Protector - - The bird feeder protector from squirrels can prevent squirrels, mice and other reptiles from entering the bird feeder or aviary, so you don't need to replenish the bird feeder frequently, and wrap around squirrel proof spring can also make the birds eat more safely. .