One Dozen PENN Radical Championship Tennis Balls

The PENN Radical Championship Style Tennis Balls are made to last and improve all players tennis game. The extra duty balls have two different colored felts that are yellow and orange to produced optical spin. This simply means that you will be able to identify the rotation of the ball after it is hit. The PENN Radicals are an excellent teaching tennis ball for those players looking to learn or improve their topspin and backspin. These dual colored tennis balls make learning and playing tennis more exciting for players of all ages. Cannon Sports sells these by the dozen--(ONE DOZEN=4 TUBES OF 3 BALLS EACH).