Newly engineered, MDX composite construction barrel is built with a multi-directional composite design to create an ultra-responsive barrel with explosive sound 2nd Generation AV2 Anti-Vibration knob features an upgraded, finely tuned harmonic dampening system for better feel and less negative vibrational feedback 2 1/4" Ring-free barrel construction allows for more barrel flex and increases performance with no "dead" spots One-piece composite construction provides a clean, consistent, traditional swing Certified for WBSC (ISF), ISA, USSSA, USA (ASA)