Easton 2015 YB15MK MAKO COMP -11 Youth Baseball Bat Ultra-thin 29/32" composite handle with performance diamond grip 2 1/4" barrel diameter Certification: USSSA 1.15 BPF, Little League, Babe Ruth Baseball, Dixie Youth Baseball, Pony Baseball, AABC Speed design for low M.O.I and faster swing speeds