Louisville Slugger 2014 SL Attack (-10) Baseball Bat with 2 5/8-Inch Barrel, 30-Inch/20-Ounce 10 length to weight ratio 2-5/8" 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 USSSA 1.15 BPF certified