Replacement Pro Series Reeds for Boyesen RAD Valves. The latest carbon fiber technology with all the advantages of Boyesen's patented dual-stage reed design. Utilizes a carbon fiber top reed and a durable fiberglass / epoxy bottom reed. Offers the quickest acceleration any reed can offer; maximize horsepower and torque. Responds quickly and accurately to changes in piston speed for smooth, dependable throttle response. No sacrifice in reed life like traditional carbon fiber reeds. Designed for the newest 2-stroke technologies. Includes petals, rev-plates and extra screws. Note: Designed ONLY for Boyesen RAD Valves.