DeMarini Flipper 1.20 Slow Pitch Softball Bat 13" 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 used with all 11" & 12" softballs regardless of their COR or compression level 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 USSSA and NSA approved