New, Other Baum Bat Composite Wood Baseball Bat AAA Pro Ash Adt 31 28 Blk 180623 31":Black Yellow Easton's trademarked Z CORE internal core 350545.9090 Wmn Blk Ryl Med Easton's trademarked Z CORE internal core technology combines with the HMX (Hyperlite Matrix) alloy to deliver the biggest sweet spot and the most pop of any BBCOR barrel providing an extra protective extension Foamed Plastic Core Composite Reinforcement Surrounding Core Provides Unmatched Durability 3 Length To Weight Ratio NCAA & NFHS Approved Approved For Minor League Game Play By Major League Baseball and Perfect Game Events 505 Inch Barrel Diameter Standard Knob Ash Wood Exterior Shell BBCOR Certified For High School & Collegiate Approval Very Balanced Swing Weight Up To 400X Stronger Than Wood Massive Sweet Spot