DeMarini Youth F5 -10 Baseball Bat with a 2 1/4-Inch Barrel SC4 Doublewall Barrel - Structure controlled alloy maximizes sweet spot with the strongest and thinnest aluminum walls 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. N2M End-Cap - Scientifically tuned to absorb vibration while maximizing power Hybrid Performance Grip - 2 piece grip with thin performance feel and faded color look The F5 -10 is for Little League and leagues requiring a 2 1/4" barrel.