Instantly indicates whether a pitch is a ball or strike. Has a strong build that is durable for plastic ball use Assembles in seconds and is portable. The lightweight and portable design is easy to assemble in just seconds, so there's no worry about set-up before game play. The high-quality construction will stand up to intense backyard game needs, and its durable construction is designed specifically for outdoor use. Whether it's Blitzball or other plastic ball games, the Blitzball StrikeZone will be there when you need it most.