1. Standard : Our pitch training baseballs are meticulously crafted to meet official size and weight standards. With a circumference of approximately 9 inches, a diameter of 2.8 inches, and an weight, they are for all types of training and realgame scenarios. 2. Outstanding Performance: The pitching practice baseball features a durable rubber core and a sturdy PVC outer shell, ensuring longevity and consistent performance. Ideal for longterm training and frequent use. 3. Effective Training: Maximize your pitching potential through efficient learning with our innovative fingerprint marking system. Visually display and quickly master various pitches, including fourseam fastball, twoseam fastball, curveball, slider, and more. for beginners looking to accelerate their progress. 4. Versatile Training Aid: This pitching practice baseball offers a comprehensive and adaptable training experience. The textured finger grips are designed to suit all players' holds, helping enhance skills for athletes of all levels.