Mizuno 340673 DUALITY HYBRID BBCOR Baseball Bat (-3) - Gray-RedMizono DUALITY HYBRID BBCOR Baseball Bat ( 3) The ultimate hybrid. Our Patented 2 Piece Dual Frequency Damper, which reduces vibration and creates less flex for higher performance and a smoother feel. Our hybrid construction combines our Hot Metal single wall aluminum alloy barrel with composite handle for ultimate combination of performance and vibration reduction. Combine that with our CorTech barrel that adjusts wall thickness across the barrel