DeMarini ONE OG Slow Pitch Softball Bat 12-inch S.ONE Composite Barrel: Used exclusively in our Stadium Power Series bats  the S.ONE composite is designed for maximum stiffness and explosive performance. ZnX Alloy Handle: By increasing stiffness and durability, the ZnX alloy handle flexes less and forces the barrel to deflect more for increased overall barrel performance. Dish End Cap: A concave design creates mass stiffness at the end of the barrel while driving energy back towards the sweet spot. Authorized for ASA, USSSA, ISA, NSA sanctioned play 1-Year Warranty