Louisville Slugger 2014 YB Warrior (-13) Baseball Bat, 31-Inch/18-Ounce 13 length to weight ratio 2-1/4" barrel diameter One-piece, durable 7050 alloy construction Balanced swing weight delivers incredible control at the plate Approved for play in Little League, Babe Ruth, Dixie, Pony, AABC, and USSSA