Made of high-quality materials and designed especially for the game of fetch, Chuckit tennis ball features an extra-thick rubber core. Bright colors provide improved visibility when playing with your dog. Use alone or with your Chuckit launcher, sold separately. These high-bouncing tennis balls are available in sizes small, medium, large and x-large, with one and two-pack. Promote add-on sales and bring customers back by choosing a variety of Chuckit specialty balls. Launcher compatible toys that bounce higher, glow brighter, whistle louder and float higher.