Chuckit! 2-Pack Medium Ultra Balls. These high-bounce balls float, are very visible, and durable. 2-1/2" diameter rubber ball is compatible with Chuckit! ball launchers. Designed for the most demanding use, it is the perfect ball for the game of fetch. Its extra-thick rubber core and quality material ensure buoyancy and durability, while the bright color increases visibility and prevents loss. In blue and orange