2 1/4 Inch Barrel Diameter Approximate -5 Length to Weight Ratio Balanced Swing Weight Bone Rubbed to Close Pores and Make the Wood Harder Handcrafted From Top-Quality Maple Wood. Crafted with the same specifications as the adult AP5, this Youth Pro Model wood bat is built for power with an end-loaded feel and large barrel that's scaled down for youth baseball players who can still mash. Knob: Tapered Handle: Traditional Barrel: Large Feel: End-loaded 2 1/4 inch barrel diameter Handcrafted from Marucci's top-quality maple Bone rubbed for ultimate wood density 30-day warranty included