SOLD! Brand New DUI/ Apeks Exhaust Valve. This is a low profile version of the Apeks Valve. The valve will fit most drysuits. Correctly adjusted, the valve gives effortless yet controlled hands free ascent as the expanding air automatically vents from the suit. Equipped with a manual over-ride system allowing you to vent the suit completely without disturbing your personal setting, The valve has the lowest profile with optimum dump rate. It has an improved ratchet feel and is ergonomically designed for ease of use. $50 + shipping