1. EXCELLENT STANDARD SIZE Our pitch training baseballs are made to official standards of 9 inches in circumference and 2.8 inches in diameter as well as official weight. Perfect for all kinds of training needs and official play occasions. 2.Excellent resilience: Improve your pitching skills with this highquality training baseball made from a combination of rubber core and durable PVC outer shell. Designed to deliver performance and last through intense training and frequent use, this baseball is a must have for any budding pitcher. 3.Accelerated learning: with a unique colourcoded fingerprint system that visually teaches grip for fastballs, curveballs, sliders and more. 4. UNIVERSAL TRAINING SOLUTION This pitching training baseball is designed for everyone and improves your skills, universally fits left and right handed users with gripfriendly fingerprints for every player.