First-stage regulator with a satin-plated brass body and heat-exchanging ribs for improved thermal performance. An over-moulded endcap and environmental diaphragm reduce ice buildup and protect the first stage from impact.

• Ribbed diaphragm clamp to improve heat exchange in cold water.
• Over-balanced diaphragm design — medium pressure increases faster than ambient pressure as depth increases, improving performance at depth.
• Five medium-pressure ports (four on a rotating turret for flexible hose orientation).
• Two angled high-pressure ports for optimal hose routing and transmitter fitting.
• Double-swivel hose for increased freedom of movement and comfort.
• Easy-to-grip DIN handwheel or over-moulded yoke handwheel; releases with one hand.
• Connection options: DIN, Yoke, and M26 thread — rated DIN 300 bar, Yoke 232 bar, M26 300 bar (oxygen service).

Standards and compatibility: Tested to EN 250A for octopus use to 60 m in cold water. Nitrox/oxygen compatible up to 40% O2 outside the EU; within the EU, oxygen mixes above 21% require an M26 connection.