Easton SCG1B CV12 Fastpitch Softball Bat (-10) THT100 Aluminum for greater durability High performance ultra thin aluminum shell design with lightweight composite inner tube Slightly end loaded for more power -10 lightweight length-to-weight ratio and 2-1/4 diameter barrel 98 MPH performance; complies with all current Bat Performance Standards -ASA, USSSA, NSA, ISF, ISA, SSUSA