Materials: We pay special attention to your pet's safety. So our cat spring toys are made from eco-friendly, safe recycled plastic, BPA free, and designed to safety standards to ensure cat toys are safe to chew on. Packaging: A pack of 20! spring cat toy size: Length 5.5cm / 2.16" * Diameter 2cm / 0.78". Cat springs can be pulled longer. You just have to let the kittens play and don't worry about losing the plastic spring! Promoting Movement: The end of our cat spring is a smooth surface. No harm to cats. These interactive cat toy plastic coils enrich our kittens with random jumps, allowing them to chase, flap and run around to improve your cat's overall health. The capricious movements will keep your cat happy by hitting, kicking, throwing Vibrant Colors: Our cat plastic springs are made up of 4 classic colors of yellow, green, pink and blue, four colors that are favorite bright colors in cat's vision. Attract the cat's attention! Multi-color and bright colors add to the fun Interactive Cat Toy: You can drop this spring toy on the ground and it will bounce up to get the cat's attention! it could entertain your kittens with random bouncing movements, and make your cat spring into action with zany delight.