Used Marucci CAT9 Connect Pastime BBCOR Baseball Bat Red White Blue 31 28 2012 multi material construction allows us to LP204G Yth Sz 13 Wht multi material construction allows us to locate the Center of Gravity with extraordinary precision for optimum ball flight and control and a stiff traditional feel with every hit The engineers also developed a Longitudinal Groove System (LGS) that takes excess weight out of the thickest portion of the bat's barrel This connector piece should create one of the stiffest feels that you'll find on a two piece bat while also mitigating the vibration that gets down to a player's hands on a miss hit