The Chuckit! is one sweet way to exercise your dog...without wearing out your arm. With the Chuckit!, you can throw that ball out of the ballpark over and over again. Chuckit! Junior is made of lightweight, durable plastic, it uses a standard 2.5" size tennis ball and is designed for hands-free pickup...so you never have to bend down and pick up a slimy ball again. Chuckit! Junior Ball Launcher has a 18" long handle. Use with medium size Chuckit! Tennis Balls, Ultra Ball, Max Glow Ball, etc. Assorted Handle Colors.