Louisville Slugger 2013 TPX BBCOR Omaha Baseball Bat ST+20 alloy provides thinner walls and greater pop 2 5/8-Inch barrel, -3 Ounce without grip 2-color end cap Composite Flex Band Barrel Technology provides the thinnest barrel walls, enhanced feel and acoustics, lower MOI-Feet=lower swing weights=greater bats speed and better performance Meets BBCOR bat standards but swings like a BESR bat with wall thicknesses like a BESR except in just 1-Inch in the barrel