Each can contains 3 tennis balls. When you play every game like it's a championship, your ball should, too. Play with a Championship ball, and you'll see why it's America's No. 1 selling tennis ball. The Pro Penn, Championship balls undergo complete quality control tests. So you know every Championship ball is going to bounce like the last one. And hold up like the first one. The Championship ball is for players who demand as much of their tennis balls as they do of themselves. Whether you're playing for trophies, or just for fun, Penn Championship tennis balls are the go-to balls around the world.