The air balanced piston designed MK25 first stage produces a reliable, low-effort delivery of air, no matter how hard you're breathing or how deep you're diving. It features a convenient swivel turret with five high-flow LP ports (high flow ports deliver about 15 percent more air than conventional LP ports). It also has an external intermediate pressure adjustment that allows technicians to maintain peak performance without the need for disassembly.

The air balanced S600 second stage features an interior titanium barrel for lightweight performance and additional corrosion resistance. The S600 delivers effortless inhalation and exhalation. It's easy to use too, with efficient user controls that include a powerful purge, an inhalation effort control knob and Venturi Initiated Vacuum Assist (VIVA) dive/pre-dive switch.

Synonymous with SCUBAPRO quality and unbeatable engineering, the MK25/S600 DEEP BUE is the preferred combo of professionals. In all water temperatures, in the most demanding dive conditions, this reg performs flawlessly, and it looks great doing it.