1. Excellent standard size: Our field training baseballs are made to official standards with a circumference of 22.9 cm and a diameter of 7.1 cm, as well as the official weight. Perfect for all types of training needs and official game occasions. 2. HIGHQUALITY DESIGN The combination of a robust rubber core and a durable PVC outer shell ensures unmatched durability and performance for frequent longterm use. Perfect your throwing skills with this highquality training baseball and watch your performance soar. 3. Efficient skills: Revolutionize your throwing skills with our innovative fingerprint marking. Visually demonstrate various throws, such as fourseam fastball, curveball, slider, and more. For beginners seeking efficient learning to quickly understand and excel at complex throws. 4. Universal fit: Enhance your game with our field training baseball. It is designed for righthanded and lefthanded players for a ier training experience. The grippy design promotes optimal dominance and makes it universally effective.