The T10-Seal Chamber 1st stage is environmentally sealed, protecting it against icing in cold water and against contamination from particulate matter in silty conditions. When paired with the Master second stage, which includes an internal heat exchanger, this regulator is an excellent choice for divers exploring the most extreme cold water environments. Very high performance regulator. Ideal for seasoned or professional divers who need extremely high performing equipment that is both simple and resistant, without any of the usual accessories that may get damaged. Technical Features 1st Stage: Hyperbalanced diaphragm (Watertight chamber on T10-SC) 2 HP 7/16 UNF ports 4 MP 3/8 UNF ports Operating pressure: 300 bar (4350 psi) DIN Version, 232 bar (3365 psi) International version Calibration pressure: 10 bar Body coated with PVD process High-capacity conical filter in chemically nickel-plated spherical bronze Removable nozzle in AISI 316 steel Hyperbalancing system Anti-pressure drop pneu