MIKEN PSYCHO Coach Pitch Baseball Bat (2-3/4) Big Barrel 2 3/4" Barrel Diameter Length/Weight: 27/15.5 BB -11.5 (BPF 1.15) With dual flex technology, our multi-layer walls maximize energy transfer pushing the limits of bat performance. The intermix of aerospace grade fiber and aramid fiber precisely angled results in a massive sweetspot and increased durability while eliminating vibration. Advanced Inner Flex Technology takes performance to the next level by delivering precisely calibrated handle flex and energy transfer to optimize barrel rebound. Advanced inner flex is customized to barrel specifications for maximum distance and ball speed.