- Standard size and weight: Our pitch training baseballs are precision crafted to official size and weight. Circumference approx 9 inches; diameter 2.8 inches; weight within a standard range for real-game practice and scenarios. - Enhanced durability: Built with a tough rubber core and a resilient PVC outer shell for lasting performance through extensive usage and training sessions. - Effective training with fingerprint marking: The innovative fingerprint marking system visually indicates different pitch types, including four-seam fastball, two-seam fastball, curveball, and slider. Helps beginners learn quickly and improve pitch recognition and grip. - Universal training solution: Designed to fit left- and right-handed players, with easy-to-grip fingerprint areas that work for every user. - Practical uses: Solo practice at home or in a cage to refine grip and release; team or group drills to execute a sequence of pitches and monitor progress; bullpen or warm-up sessions before games to build consistency.