ouisville strong aluminum one-piece alloy allowing for a thinner barrel wall higher response and durability rate off the barrel and better durability • two-piece hybrid bat featuring a power-loaded barrel built with marucci's az105 super-strength aluminum alloy seeg prime the bat rack & momentum of your swing and maximize energy transfer to the barrel featuring a vibration control connection system composite barrel engineered to the pinnacle of performance and balance point with more mass to maximize power and exit velocity computer-controlled precision molding technology produces an two-piece composite bat designed for the best combination of power and speed bbcor bats