Power Force Weighted Baseballs | 3" Diameter - 15 oz | Weighted Training Baseballs for Batting Practice | Mega Pack (20 Baseballs) 12 MONTH WARRANTY COLOR CORRECT Sports Researchers have determined that color is the most important element in repetitive memory development. Power Force Baseballs are white, which increases the players memory response during actual game conditions. STRONGER POWER HITTERS Teaches Hitters to drive the barrel through the ball and finish strong. INSTANT FEEDBACK Player, Coach and Parent instantly know if there's good contact. HIT ANYWHERE Backyard, Practice or Tight Tournament warm-up area.