Easton BG2 Rival Bbcor Adult Baseball Bat (-3) BBCOR certified, -3 length-to-weight ratio adult baseball bat with low moment of inertia for faster swing speeds 2 5/8-inch diameter, THT100 aluminum barrel for durability, strength and toughness Thin 31/32-inch handle with Stiff Flex Rating for power through the hitting zone Patent-pending Brace Barrel technology to meet BBCOR compliance at a minimized swing weight Single System Technology (SST) one piece design for increased bat control and balance