Durable material: spring loaded cat toys are made of plastic, soft on the outside and elastic, the erratic movements will keep your cat on their toes while flapping, kicking, rocking and tossing , your cat will have fun Universal size: spring loaded cat toys are approx. 5cm/1.97inch in length, 2.5cm/0.98inch in diameter, let your cat have fun chasing the colorful cat toys around while their unpredictable bounce drives them crazy Assorted colors: you will get red, blue, yellow and green spring cat toy, they could entertain your kitties with random bouncing motions and make your cat pop out with goofy delight Wonderful toy for Cat: Lots of entertainment can effectively relieve the cat's lonely mood and prevent it from depressed, preventing your cat from tearing, howling or biting the furniture Healthy cat: great for keeping your kittens busy when you are away or when you want to bond and exercise with them, burn your kittens extra energy, help your cats stay fit and healthy