DeMarini F5 Slowpitch Softball Bat The New and Improved F5 slow pitch softball bat's barrel is constructed from SC4 Aluminum Alloy which is 12% stronger allowing for the thinnest walls available. The Doublewall construction gives this bat maximum performance. The DeMarini F5's C6 Composite handle is a wider composite weave maxing out handle performance with optimal flex. The N2M End-Cap is tuned to absorb vibration while pushing the DeMarini F5 to its most powerful limits. Hybrid Performance Grip - 2-piece grip with thin performance feel and faded color look which provides optimal comfort and tack.