Check the listing for details. TUSA RS-790 Regulator. Condition: New. Listed at 529.00 USD. TUSA RS-790 RegulatorSKU: TBTRS790Mfr. Part: RS-790 DescriptionThe TUSA RS-790 regulator is a high-quality regulator designed specifically for scuba diving. Its first stage regulator is made of marine brass that is chrome plated, and its design is a balanced diaphragm that is environmentally sealed. This means that the internal mechanism is protected from contamination from external elements such as salt, sand, chlorine, or pool acids that can corrode and deteriorate regulator performance. To further enhance the regulator's performance, TUSA has added a dry ambient pressure chamber to prevent water from entering the main spring cavity. This chamber maximizes the regulator's performance in cold water diving conditions below 50 Degree F (10 Degree C). Additionally, the outside of the chamber is ribbed, which increases the surface area and acts like a radiator to transfer heat further, reducing the problems associated with cold water diving. The first stage has four low-pressure ports and two high-pressure ports, with the high flow low-pressure ports positioned near the diaphragm, which increases airflow by up to 15%. The second stage is pneumatically balanced, with a small chamber that traps air and forces the poppet back against the intermediate pressure orifice, providing smooth breathing in all conditions. The regulator is lightweight and compact, making it easy to carry and use during diving sessions. It also comes with a Venturi adjustment lever that has two positions selectable by the diver, and a silicone mouthpiece that is orthodontic-conscious and designed for comfort. The regulator is Nitrox compatible up to 40%, and it comes with a comprehensive owner's manual to help you understand its features and how to use it properly. Overall, the TUSA RS-790 regulator is an excellent choice for scuba divers who want a high-performing, durable, and reliable regulator that can withstand harsh underwater conditions.FeaturesTUSA RS-790 Regulator:Superior Performance and Quality in Compact Lightweight DesignHose: 29" (74 cm) 3/8" ThreadOwner's ManualFirst Stage:Balanced Diaphragm DesignAnti-Freeze SystemDry Ambient Pressure ChamberIdeal for Temperatures Below 50°F (10°C)Nitrox Compatible to 40%Environmentally Sealed2 High Flow LP Ports 15% Increase Air Flow2 Standard LP Ports2 HP PortsSecond Stage:Pneumatically Balanced DesignLightweight, Compact Composite CaseVenturi Adjustment LeverOrtho-Consciously Designed Silicone MouthpieceSpecifications1'st Stage TypeBalanced DiaphragmLP Ports2 High Flow, 2 Standard, 3/8" ThreadHP PortsTwo 7/16" ThreadedAdjustable 2'nd StageVenturi Adjustment Lever2'nd Stage TypePneumatically BalanceNitrox CompatibleYes, Up to 40%Materials1'st Stage; Chromed Brass, 2'nd Stage; Composite and Silicone RubberHose Thread3/8"Hose Length29" (74 cm) Feedback is a very powerful tool. 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Inspect the equipment when it arrives, and if you're not fully satisfied you can return it for a full refund (less the shipping charge) as long as you haven't used it. We won't even ask why you've changed your mind. You'll need the original manufacturers labeled packaging with all materials, manuals and blank warranty cards. Books, CDs, DVDs may not be returned (due to copyright laws). Sorry. Merchandise returned in used condition or not in its original packaging may be refused, and the carrier will charge you freight in both directions. Please allow 2 days from the date we received the package for us to process your return. ate we received the package for us to process your return.