These balls are all USSSA game baseballs, ideal for high school practice and youth games. A full-grain leather cover makes these baseballs durable enough to withstand repeated blows from the hardest hitters and a cushioned rubber and cork core wound with 5% wool yarn maintains the ball's shape, size, and weight under intense use. These balls are stitched with raised seams for improved grip and greater control of the ball's flight path through the pitching motion. They also come by the dozen; get 12 baseballs in one order.