This is the award-winning toy that launched our company! Take two colorful, rugged, custom tennis balls, fuse them to a durable, safe, rubberized center with our patented dog-proof process, and what do you get? The perennial favorite dog toy with the wacky bounce. Toss em, tug em, float em. Available in a range of popular TennisBone styles to suit all breeds and sizes. The ORIGINAL! Two standard 2.5-diameter tennis balls attached to the super-tough rubberized base.