[Worms Refills ]:Various toys will bring out your cat's predatory instincts, and they will jump, pounce, kick and chase. They'll keep your cat energized, increase her exercise, keep her happy and healthy [Excellent Cat Toys Refills]: Suitable for kittens and cats of all sizes. Perfect interactive toys for a good time with your fur friends It is about 23cm long and weighs about 5g. [Easy To Use]: Each is equipped with a loop for replacement, easy to be attached to anywhere you want. Perfect for hang on the wand, chair, door handle and cat climbing frame. [Good Quality and Non Toxic]: Cat Worm teaser toy is made from safe, non-toxic, eco-friendly material. It is safe and enjoyable for your cats. [Please Note]: Always supervise your cat when playing with this, or any, cat toy. Please put the toys in a safe place when not in use. This practice will add lots of life to your new cat toy.