MARUCCI CATX COMPOSITE SENIOR LEAGUE -10 USSSACATX COMPOSITE SENIOR LEAGUE 10 Finely tuned barrel profile creates a slightly more balanced design to help players generate faster swing speeds while maintaining larger composite barrels. S 40 composite handle helps to transfer more energy faster from player to ball for more performance, while the outer locking system dismisses virtually all vibrations on contact for the strongest, smoothest swing yet. Fine Tuned Barrel Profiles: create a more