2018 DeMarini CF Zen -10 Youth Baseball Bat: WTDXCBZ18100% Paraflex Composite Material - 22% stronger for more precise weight distribution with massive and mad pop3FUSION Handle - New streamlined design allows for greater weight control and feel3FUSION End Cap - Optimizes bat weight and performanceD-Tak Bat GripBalanced Swing Weight-10 Length-to-Weight drop2 3/4" Barrel DiameterUSSSA 1.15 BPF Approved: Not approved for leagues that require the new USA baseball stampOne Year Manufacturer's WarrantySizes: 28" 18oz, 29" 19oz, 30" 20oz, 31" 21oz, 32" 22oz