Louisville Slugger 2014 YB Attack (-10) Baseball Bat, 30-Inch/20-Ounce 10 length to weight ratio 2-1/4" barrel diameter The first ever 3-Piece Pure 360 Composite construction provides thinner walls for more pop and less weight Patented Tru3 Technology provides maximum trampoline effect and sting elimination Approved for play in Little League, Babe Ruth, Dixie, Pony, AABC, and USSSA