The C370 is the newest addition to Scubapro's family of high performance second stages. Based on the compact C350 case, the new C370 brings forth the best features of its predecessor while adding a balanced valve to its design. A brand-new exhaust tee based on the S620 Ti's design contributes to better work of breathing (a 10% improvement over the C350). A compact hi-flow mouthpiece, also borrowed from the S620 Ti due to positive feedback, has been added to increase both airflow and mouth comfort. Fully adjustable, the C370 includes a user adjustable inhalation effort control knob along with a small coaxial dive/pre-dive lever. The new air balanced C370 is lightweight, breathes easy, offers full user controls and delivers effortless airflow.Air-balanced valve smoothest out the inhalation effort at varying depths and supply pressures. Compact, rugged fiberglass-reinforced nylon casing takes up little space in a dive bag. Stainless steel frame on the front cover adds the Scubapro C-Series signature. New poppet and lever allow the design to maintain the same overall size as the C350. Large purge button is easy to activate, even wearing thick gloves. Super-flow hose features an oversized bore that allows more air to flow on each inhalation. Compact Hi-Flow mouthpiece improves airflow as well as mouth comfort, fitting all mouth sizes, from smallest to largest. The second stage regulator weighs 6 oz (171g).