Oceanic EDX First StageEDX First Stage This top of the line cold forged, over balanced diaphragm first stage is environmentally sealed and comes with 4 low pressure and 2 high pressure ports. It also comes equipped with a heat exchanger for added cold water performance. Features: Oceanic eDX Yoke 1st stage regulator Balanced diaphragm design Environmentally sealed construction Nitrox Ready Up to 40%, Out of the Box eDX: Specs 1st stage Available in Yoke & DIN Valve Type