Material: These colorful spring cat toys are made of BPA-free plastic thats safer for cats and kittens, its lightweight, durable, and safe for chewing. Size: 4.5cm long, 0.22cm thick, Diameter 2.5cm Bright Colours: Every set comes with 12 total cat spring toys including 3 green, 3 yellow, 3 blue and 3 red spring cat toys. Let your cat have fun with the colorful springs cat toys. Promote Agility and Exercise: An interactive cat toy for enrichment our kitty spiral springs jump around randomly to keep them chasing, swatting, and running around. An Interactive Cat Toy: A great way to build strong bonds with your pet these cat coil springs keep them active which is good for lasing mental and physical health.