Now available individually for the first time, the Control-A-Balls each behave slightly differently. The balls included are: match, light, heavy, grip-less and unstable. Using these different balls at different times before using a standard ball challenges the player and advances their responsiveness in a match situation. The Control-A-Balls are available in size 5. If you are wanting to enhance your performance when it counts, the Control-A-Balls are exactly what you need to take training to the next level this season.