Durable materialThe Cat Toy Spring are made of plastic, soft on the outside and elastic, They are non-toxic, tasteless and safe to use. Universal sizeThe Cat Toy Spring spring is about 4.5cm long and 2.5cm in diameterthey could entertain your kittens with random bouncing movements. Four colorsyou will get 36 pieces red rose spiral cat toys , blue, yellow and green, 9 of each color, mixed colors make the toys more attractive. Interactive cat toysYou can throw this spring toy on the ground and this toy will jump and thus attract the cat's attention. The cat will be fascinated by this toy. Healthy ExerciseGreat for keeping your kittens busy when you are away or when you want to bond and exercise with them, burning off extra energy from your kittens, help your cats stay fit and healthy.