DeMarini took the characteristics from The Stadium Softball Bat and made it even more intense for 2014, adding both power and durability. The 4.ONE composite barrel is designed for maximum stiffness, all the way through to the dish end cap. With a concave shape, this cap uses the barrel structure to drive energy back into the sweet spot on every hit. On the opposite end, an SC4 alloy handle brings DeMarini's strongest alloy to increase the bat's trampoline effect. It's covered in a Hybid Comfort, two-piece grip for comfort and tackiness on your gloves. Rotation Index on the bat uses a numerical system to help players extend the life of their bat. 2 1/4 barrel. 26, 27, 28, 30 oz. USSSA, NSA, ISA Approved. **Unwanted bats returned to Eastbay must not be used and must be in original packaging** To contact a manufacturer about a warranty, please refer to our Bat Warranty Manufacturer Contact List .