Total Control Ball TCB 74 Baseball Batting Ball Weighted Training Hitting Batting Aid 12 Ball Pack Perfectly weighted by design, Total Control Balls are used for optimum resistance to develop slow-twitch and fast-twitch muscles Smaller version of TCB ball created in response to stronger, more advanced hitters Features Size: 2.9" in diameter Weight: 425 grams (14.9 oz.) Instant Feedback Limited Space Required Perfect 12 Ball Pack