Wilson A1015BSST Raised Seam High School Baseballs are sold by the dozen. Grade C full grain leather. Super Seam Technology: with seams 20% higher than raised seam baseballs, pitchers experience superior control on the mound. Fielders can locate the ball quicker in their glove and throw with more accuracy. Red cushioned cork to energize the bat bat/ball collision. Added to the cork is the Dura-core technology which helps the ball retain hardness 15% better than the competition. Formed to withstand impact and give you the game changing performance you need.