1. Strict official standard: Our pitch training baseballs are carefully designed with an official standard size and weight of approximately 9 inches in circumference and 2.8 inches in diameter, making them perfect for all official game occasions and various training needs. 2. Excellent performance: With an excellent combination of rubber and PVC, this pitch training baseball unmatched durability and reliable performance, making it an ideal choice for frequent and longterm use. 3. EFFECTIVE TRAINING Maximize your pitch potential through effective learning with our innovative fingerprint marking system. Visually display and quickly grasp different pitches, including the fourseam fastball, twoseam fastball, curveball, slider, etc. Ideal for beginners looking to accelerate their progress. 4. Versatile innovation: This pitch training baseball can meet your needs, whether you are lefthanded or righthanded. The fingerprints are designed to adapt to each player's grip, thus making it a versatile tool to enhance your skills.