1.STANDARD PERFECTION Our pitch training baseballs are precision crafted to match the official standard size and weight. With a circumference of approx. 9 inches, diameter of 2.8 inches and suitable weight, they are perfect for all kinds of exercises and real game scenarios. 2.Highquality design: The combination of sturdy rubber core and an elastic PVC outer shell provides unmatched durability and performance for longterm frequent use. Perfect your pitching skills with this high quality training ponkball and your performance fly. 3.Accelerated Championship: Revolutionize your pitching skills with our innovative fingerprint marking system. Simply understand the grip for fastballs, curveballs, sliders and more to speed up the learning process. 4.Versatile training aid – Experience a more versatile and integrative training experience with this pitch training baseball court. It is suitable for both lefthanded and righthanded users with fingerprints that fit any grip and exponentially improve your skills.