Our M1 has expanded performance range for nearly any dive scenario, recreational or technical, and is Nitrox ready up to 80%. The first stage is chrome plated brass, is environmentally sealed, and also comes with the swiveling 5-port low pressure cap and two high pressure ports. The M1’s second stage features a surge protected front cover design, super wide exhaust deflector, and uses our engraved heat protecting jam nut for freeze prevention.