Baseball Pitching Trainer Kit Bundle -- Pitch Training Baseball with Detailed Grip Instructions Insider Bat Baseball Pitching Trainer Bundle. Baseball with color-coded circles for proper finger placement to learn each pitch. This bundle includes separately licensed Insider Bat instructional cards with detailed information and photos showing the proper grip and throw for each pitch. Baseball training ball can be used by Lefties and Right Handed pitchers. 9" official size and weighted pitching trainer ball. Great for Baseball Coaches and aspiring pitchers -- the perfect baseball trainer gift. Purchase Insider Bat's products from an authorized retailer (Buckeye Nation Sales) to ensure you receive verified authentic design.