The Echo Connect by Marucci features a newly engineered, MDX composite construction barrel that's built with a multi-directional design to create an ultra-responsive sweet spot with an explosive sound at impact! The SDX EXT barrel-to-handle connection increases stiffness to maintain energy transfer to the ball, while dismissing all the harsh, unwanted vibrations from your hands. The Ring-Free barrel construction allows for more barrel flex and increases performance with no "dead" spots. The sting-free nylon knob pairs with the micro-perforated soft-touch bat grip to give you nothing but the best in comfort and control as you step up to the plate. Echo Connect Fastpitch 10 Our highest-performing composite fastpitch bat to date is not only ultra-responsive with explosive sound but breaks in quickly and is game-ready out of the wrapper. Newly engineered, MDX composite construction barrel is built with a multi-directional composite design to create an ultra-responsive barrel with explosive sound SDX EXT, Extended Shock Dissipating Connection (US Patent No. 10,016,667), increases stiffness to maintain energy transfer to the ball, while also dismissing all harsh, unwanted vibrations from players’ hands Ring-free barrel construction allows for more barrel flex and increases performance with no "dead" spots Carbon composite handle and MDX composite barrel connect by SDX EXT to dismiss harsh, unwanted vibrations from players’ hands Sting-free nylon knob for improved comfort and control Micro-perforated soft-touch grip with extra tack improves feel and control The Echo Connect comes standard with a black 1.75mm grip Grip weight and manufacturing tolerances may cause slight deviation from the listed weight Certified for WBSC (formerly ISF), ISA, USSSA, USA (formerly ASA) 2 ¼” barrel diameter Model # MFPEC10