The Bull Carbon Fiber Ultra Low Deflection RK Shaft is available in 11.75mm and 12.25mm tip sizes. Equipped with the Kamui Athlete soft tip on an all 100% Pure Carbon Fiber (no fiberglass or composite mix) shaft enhances the stiffness and resulting in a lower deflection shaft. This unique construction offers players unparalleled feedback that still has the wood feel to it without a pingy or hollow sound. The RK shaft is stiffer and lower deflection than the original Bull Carbon fiber shafts but it still comes with the same V-Tek interchangeable joint system so you're not tied down to a certain pin style!