Check the listing for details. Atomic Aquatics M1 Octo. Condition: New. Listed at 369.95 USD. Monel OCToTHE PERFECT OCTO FOR EXTREME CONDITIONS Extreme diving makes having an extraordinary Octopus even more important. The Atomic M1 OCTO is a Safe Second that performs equal to its M1 primary dive buddy. Cave diving, cold water and rough water conditions demand backup systems divers can count on when needed. The M1 OCTO delivers confidence in extreme situations.A SAFE SECOND FOR HIGHER O2 MIXTURESIf you are diving with a primary specified for higher EAN mixtures, you need a Safe Second to match. Atomic M1 OCTO parts used throughout the second stage are identical to the M1 primary model. The M1 OCTO is factory-ready for EAN mixtures up to 50% or Oxygen mixes up to 80% when special guidelines are followed. M1 Octo Specs: The M1 safe second is factory rated for oxygen-enriched mixtures up to 80% The demand valve body is Zirconium plated brass for fast thermal transfer with a heat sink feature to reduce the possibility of freezing in cold water The critical metal components of the demand valve are all made of Titanium or 316 Stainless Steel and are completely corrosion proof The front cover is designed to limit sensitivity to currents and swift moving water 36" hose. 2-YEAR / 300-DIVE SERVICE INTERVALLIMITED LIFETIME WARRANTY