Throwing balls can get tiring after a while, your arm gets tired and the balls don't fly as far. With the handy ball throwers, you can throw the tennis balls much further with less effort. Plus, you don't have to bend down to pick up the dirty balls with your hand, you can just pick them up with the launcher. 20 tennis balls included. Ball Launcher Set Details - Length blue thrower: approx. 49 cm - Length green thrower: approx. 36.5 cm - Diameter per ball: approx. 6 cm - Material: Plastic (PP) - Colour: Blue and green - In 8x set Ball Pitcher For Dogs - Fun for dog and owner - Ideal for garden, park or open field use - Ensures distance throwing - Pick up balls without bending over - Keeps hand clean from mud, etc.