Using the Scream Ball Launcher means you get no more mucky hands as you can enjoy slobber-free ball pickup while you play with your dog! Throw a ball further and faster over and over with minimal effort - meaning more Scream fun for you and your dog to enjoy and live life loud, just as Blaze does! The Scream Ball Launcher comes with its own Scream ball, so you are ready to play immediately. The Scream Tennis Ball features A SOLID FOAM FILLING to make these tennis balls more durable, bounce higher and go further and faster than ordinary tennis balls! These Launchers use a standard size medium Scream ball. Extra replacement balls are available for additional purchase.