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The Scuba Club

Established 1972

MK11/C370 First and Second Stage


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The C370 might just become your new favorite travel regulator. It 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 fashioned after 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.

Not only is the C370 the perfect travel companion for everyone, our female and smaller test divers also find it very comfortable – due to its size and weight. It’s a great regulator for those looking for performance at a mid-tier price. You’ll want to add this to your regulator collection.


The MK11/C370 is a great choice for dive-trekkers. The balanced diaphragm MK11, with its chrome-plated brass body specially designed to reduce size and weight, is an ideal travel companion. Its system features internal parts that are sealed from the elements. The new C370 is the perfect companion – compact, lightweight, with multiple user controls, plus it’s an easy breather delivering lots of dependable airflow wherever your travels may take you.

• Air balanced valve smoothes out the inhalation effort at varying depths and supply pressures.
• Compact rugged fiberglass reinforced nylon casing and new exhaust tee take up little space in a dive bag.
• Stainless steel frame on the front cover adds the SCUBAPRO C-Series signature.
• A new poppet and lever allows the design to maintain the same overall size as the C350.
• A new exhaust tee based on the S620 Ti’s design contributes to better work of breathing (a 10% improvement over the C350).
• User controls include a diver-adjustable inhalation effort knob and coaxial Venturi-Initiated Vacuum Assist (VIVA).
• 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 smaller to largest.
• Weight: 6oz/171g.
• Airflow at 2900psi/200bar: (l/min/SCFM): 1600/57.

Simple and reliable, the air balanced C370 delivers consistent airflow, ease of use and dependability, making it just the ticket for recreational divers in general, and dive travelers in particular. Thanks to its compact size and light weight, this is also a fantastic regulator for our female divers and smaller sized divers. With the MK11/C370 regulator system in your dive bag you’ll be ready to hit the road.