DeMarini Flipper OG Slow Pitch Softball Bat 13 inch divergence barrel: two layers of composite materials sandwich an Air gap, creating a Super responsive sweet spot. This barrel is designed for maximum performance when hitting high COR low compression balls 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 ASA approved