The ATOMIC Z2 1st and 2nd Stage Regulator won Scuba Lab Tester's Choice Award. Features of this outstanding regulator include: SCUBA LAB TESTER'S CHOICE WINNER ...the Z2 delivered perfect simulator scores." Scuba Diving magazine Muscle Regs - ScubaLab, November 2005 ATOMIC Quality Exceeds all expectations The Z2 is constructed with Zirconium Atomic designed our signature breathing performance into the B2 to give a diver the perfect combination of comfort, style and value. The "Z" designation is represented by the use of Zirconium as plating material for the precision machined Brass valve body Atomic developed a Zirconium over Chrome over Brass plating process to deliver corrosion-resistance 3-4 times that of conventional chrome plating The Z2x second stage lever, orifice and spring are Titanium The Z2x is Atomic's most compact and economical regulator system But its rare combination of performance, ergonomics and materials is unmatched by competitors at any price First Stage Specs: First stage materials are chrome-plated Brass and 316 Stainless Steel Atomic Jet Seat high-flow piston first stage Nitrox ready for mixtures up to 40% Optional factory-sealed first stage to prevent outside contamination such as silt and sand and prevent freezing 2 HP fixed / 7 LP on fixed cap Available in DIN or YOKE Second Stage Specs: Second stage components are made of precision machined Brass with Zirconium plating and Titanium Patented Atomic Seat Saving Orifice (Titanium) Patented Atomic Automatic Flow Control (AFC) Rapid adjustment knob for manual second stage de-tuning in special situations A new high-flow second stage case that significantly lowers breathing effort at any depth from shallow water to beyond the limits Dual material second stage cover enables entire front to be used for purge Dual silicone comfort fit mouthpiece with tear-resistant bite tabs 2 year/300 dive service interval Limited Lifetime Warranty - not contingent on proof of service The "Z" designation is represented by the use of Zirconium as plating material for the precision machined Brass valve body. Atomic developed a Zirconium over Chrome over Brass plating process to deliver corrosion-resistance 3-4 times that of conventional chrome plating. The Z Series second stage lever, orifice and spring are Titanium. Designing affordability doesn't mean using shortcuts The Z Series is our most compact and economical regulator system. But its rare combination of performance, ergonomics and materials is unmatched by competitors at any price. The Z Series gives divers the assurance of the same Limited Lifetime Warranty as all Atomic regulators. Because you deserve it! DIVE THE BEST! DIVE ATOMIC! "