Features: 1.This is a collar with cat teaser, and it can be worn on cats' neck or head, and feather on the teaser will swing along with cats' movement. 2.Swing of feather will attract cat and making them chasing and biting feather, so as to exercise cat and improve their physique and intelligence. 3.Can be mounted on the top of your shoe and play with your cats, having them chasing you around, which will make them more active and healthy. 4.You can also have many cats play with the collar, providing different experience. Playing this toy will ease cat's anxiety and improve their happiness. 5.Made of high quality ABS, easy to wear, durable and sturdy, ready for long term use. It also prevent cats from forming a habit of damaging your furniture, cloth, etc. Specification: Item Type: Cat Teaser Collar Material: ABS Weight: 26g/0.9oz Product Size: Approx. 31x4.9cm/12.2x1.9in PackageList: 1 x Main Teaser Collar 1 xHook and Loop 1 x Spring 1 x Feather Note Please allow 2?3cm error due to manual measurement. Thanks for your understanding.