Meets new USA Baseball standards 1-piece sl hyper alloy construction New speed Ballistic end cap New custom lizard skin premium performance grip The new solo 618 (-11) 2 5/8 inch USA Baseball bat is designed for players looking to match the high heat with a little more speed of their own. Built with a 1-Piece SL Hyper alloy construction, the solo 618 delivers stiffer feel and maximum energy transfer on contact and the new speed ballistic end cap delivers maximum swing speed through the zone. Make every swing count and find your bat from the most trusted lineup in the game: Louisville Slugger.