Combat Avaritia Fastpitch Softball Bat - 100% Composite -9, -10, & -11 100% Composite Construction - 2 1/4 Inch Barrel Diameter - Two-Piece Design Approved for Play in ASA, USSSA, NSA, ISA, ISF Blended Fiber Technology - Handle Isolation Technology (HIT) Nanocomp Technology Inside - Variable Stiffness Technology for Bigger Sweetspot Full Twelve (12) Month Manufacturer's Warranty