The unique design of the Throttle Preset provides maximum unrestricted air flow at a constant output pressure, without all the hassles of fine tuning or changing a bad o-ring. Simply screw on the Throttle air system and you can be assured that you are playing with the most efficient, consistent and durable air system. As with most preset systems, this regulated air system must be used in conjunction with a good in-line reg, such as the Dye Hyper2 Reg.