The DeMarini CF (-10) Fastpitch Bat Speaks for Itself. Designed to deliver a balanced swing weight and positive feedback on contact, the CF (-10) is perfect for players looking to drive the ball from gap to gap and out of the yard. The game's top travel ball players and collegiate talent trust CF for its responsive and durable Paraflex Plus Composite Barrel. The two-piece composite construction with a new Type-V Connection creates a great feel and directs your energy into the heart of the barrel. The lightweight composite Tracer End Cap is designed to maintain barrel integrity and optimize performance.