Localized Stiffening Technology allows for a traditional composite feel while maintaining BBCOR standards. Anisotropic Composite Design Technology varies stiffness along the handle to reduce vibrations and sting, and across the barrel for softer feel and improved bat performance. Blended Fiber Technology blends three different fiber types to create a bat that is ultra-light with phenomenal stiffness and strong with incredible toughness and vibration absorbing properties. Variable Stiffness Technology allows Combat engineers to design lower barrel wall stiffness on both sides of the normal sweetspot, resulting in an enlarged sweetspot area. Precision Molding Technology allows engineers to design barrel wall thicknesses to maximize barrel trampoline and bat performance. Nanocomp Technology Inside disperses carbon nanotubes throughout Combat's proprietary tough liquid resin, effectively filling all relatively low strength microscopic gaps between fibers which results in a dramatic increase in strength and durability. BBCOR certified. 2 5/8" barrel diameter.