DeMarini Voodoo -9 Senior League Baseball Bat with a 2 5/8-Inch Barrel SC4 Alloy Barrel  DeMarinis proprietary aluminum extrusion provides a thickness tuned wall that reaches down the entire length of the barrel to create a wicked sweet spot that can stand up to each crushing blow. Tri Strut TR3 Handle Its the tightest/strongest composite DeMarini have developed. Gaining strength through triangular formations at the molecular level it efficiently transitions power from your hands to the barrel giving you balance and consistency. ION-V Endcap  The diabolical, dual density cap completes the power structure. Its designed to maintain the stiffness of the barrel while dampening impact vibration to give you amazing feel, shot after shot. The Voodoo -9 is for senior youth big barrel and travel leagues