The Scubapro MK25 EVO / S600 dive regulator system with R105 Octopus combines a high-airflow balanced piston first stage with a proven air-balanced second stage for consistent breathing performance across a wide range of depths and water temperatures. The air-balanced design maintains stable intermediate pressure regardless of tank pressure or depth, supporting smooth inhalation and reliable airflow during recreational and advanced scuba diving.

The MK25 EVO first stage is constructed from chrome-plated marine brass and incorporates Scubapro’s Extended Thermal Insulating System (XTIS) to improve freeze resistance in cold water. A rotating swivel turret and generous port layout allow clean, streamlined hose routing. The S600 second stage features a metal valve housing and reinforced technopolymer body, offering durability, efficient heat exchange, and user control over inhalation effort. The included R105 Octopus provides a dependable alternate air source with a classic downstream valve design and high-visibility front cover for easy identification.