Whether you"re aspiring to be the next Serena Williams or Roger Federer, get your game off to a good start with Wilson"s Starter Play Balls. Serve up ultimate performance with a ball that"s ideal for easy learning and lots of on-court fun.It"s also approved by the International Tennis Federation.Features:Intermediate Tennis BallsBalls are 25% slower than normal Tennis BallsIdeal for easy learning and more funDesigned for stage 1 - greenITF approved1 Dozen packed as 3 x 4-Ball can.