Zeagle Flathead 7 Balanced Nitrox Environmentally Sealed 1st & 2nd Stage Regulator Yoke & Din Option FLATHEAD-7 FIRST STAGE FEATURES: Environmentally Sealed, Balanced, 5 LP Ports, 2 HP Ports, Ideal for cold water SECOND STAGE FEATURES: Downstream valve, Balanced Diaphragm, Dive/Pre Dive Venturi Control, Diver Adjustable Breathing Sensitivity, New Compact Profile House of Scuba is an authorized Zeagle dealer