DeMarini 2015 Youth Insane Baseball Bat Low Profile D End Cap is scientifically tuned to absorb vibration while maximizing power and keeping swing weight low Hybrid Comfort Grip 2-piece grip built for ultimate comfort and tack SC4 Alloy constructed with proprietary aluminum extrusion provides a thickness-tuned wall that creates a wicked sweet spot Rotation Index (Numerical system) reminds players to rotate bat extending its life Made in the USA, meets 1.15 BPF youth baseball standard, approved for play all youth baseball associations and 12 month limited warranty