A bullet proof combination and pinnacle of design and build quality.

MK25 EVO Year after year, SCUBAPRO's flagship high-performance first stage consistently ranks as the top-performing first stage on the market. With this air-balanced flow-through piston-style first stage mounted to an air cylinder, you are guaranteed superb inhalation sensitivity and instant delivery of air on demand, in all diving environments and all water temperatures.

PATENTED EXTENDED THERMAL INSULATING SYSTEM (XTIS) Fully insulates the inner mechanism from the environment, improving cold-water resistance and delaying ice formation.  This radically increases breathing reliability when diving in extreme water temperatures. OPPOSING HP PORTS Allow the first stage to be positioned either up or down.  FIVE HIGH-FLOW LP PORTS Provide 15% higher airflow than standard low-pressure ports. They are also mounted on a 360 degree swivel turret to maximize hose routing options.

Precision hand-crafted A-Series second stages are built to last. With its striking all-metal casing, screw-down casing cover and metal valve housing, the A700 is muscular in build as well as performance. Its air-balanced valve technology, stainless steel inlet tube and oversized exhaust valve deliver an ease of inhalation and exhalation that is unmatched. A700 Designed for divers who want the best, the full-metal A700 offers excellent breathing performance. Teamed with a MK25 EVO or MK17 EVO, it provides unparalleled breathing performance in all water temperatures.  FULL METAL CASING Enables you to take advantage of the high heat exchange rate, a huge plus for cold-water diving. BETTER BREATHING Metal construction enables the use of a larger diaphragm inside a compact casing, increasing breathing sensitivity. COLD WATER CERTIFIED Meets new EN250-2014 standards for cold-water breathing performance.