These Official League baseballs are designed for high school and youth practices. A genuine leather cover makes them durable, so they last longer through practice drills. These baseballs are stitched with raised seams for improved grip and greater control of the ball's flight path through the pitching motion. Made with a C-2 poly bond cork and rubber core with a vinylon finish wind. These baseballs come by the dozen; get 12 baseballs in one order.