Product Name: Squirrel Proof Spring Main Material: Metal Outer Diameter: 58-60mm Height: About 48-50mm Color: Silver Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 2. Please allow slight dimension difference due to different manual measurement. Thank you for your understanding. [Anti-Eating Device] If the squirrel or raccoon tries to climb the pole to eat the feed, the spring mechanism will start to stretch, keeping the animal away and preventing them from climbing to the top. [Easy to Install] The spring device can be installed on various styles of hooks without adjustment, which is simple and convenient. [Good Elasticity] The spring device has good elasticity and can be stretched to a sufficient length to keep a sufficient distance between the bird feeder and the squirrel, providing a stable foraging place for birds. [Good Metal Material] Our squirrel proof spring is made of high-quality metal, not easy to wear or break. The smooth edge will not hurt animals, you can use it for a long time with confidence. [After-sales] If you have any questions, please get in touch with us, our service team will provide you with a professional and satisfactory service.