The Aqua Lung Helix 1st Stage Din Regulator is a great mid-range regulator that will not disappoint! It has balanced first and second stages and represents the bones of the Aqualung regulators!

Aqua Lung Helix 1st stage Regulator - Din Features:

- First Stage -

• Balanced Diaphragm 1st stage provides superior, consistent performance
• "T" shape body for streamlined hose positioning
• Reduced exhalation effort

- 2nd Stage -

• The in-line ergonomic Venturi knob allows for making precise adjustments even whilst wearing gloves
• Comfo-Bite Mouthpiece - Reduces jaw fatigue and secures the second stage comfortably
• Pneumatically balanced for smooth, easy breathing