Check the listing for details. Atomic Aquatics Z3 Second Stage Regulator. Condition: New. Listed at 419.95 USD. Z3 Zirconium Regulator ATOMIC AQUATICS SIGNATURE FEATURES Divers on a budget can experience virtually the same easy, natural breathing and corrosion-resistance as the entire Atomic regulator line. The Z Series Second-Stage is a Balanced Linear Flow Design for Extremely Easy Breathing at all Depths and Dive Conditions. The Z Series Second-Stage is Built-to-Last with a Zirconium Plated Brass Demand Valve Body, Titanium Lever and Sealing Orifice. The Diaphragm is made from High Quality Silicone Rubber. This Pneumatically-Balanced Poppet Second-Stage has Atomics Patented Seat Saving Dynamic Orifice which unlike most Second-Stage Orifices is a Floating Valve Design which Reduces Wear on the Second-Stage Poppet Seat when the Regulator is not pressurized adding Life to this Important Seal. PATENTED AUTOMATIC FLOW CONTROLThe Venturi effect inside a second stage makes it breathe easy, and the Atomic AFC eliminates the manual adjustment normally needed to regulate Venturi effect as you dive deeper. No dials to turn or buttons to push. A Rapid Adjustment Knob is included for special situations like surf entry or octo use. (US Patent No. 5,678,541) Z3 SECOND STAGE FEATURES Precision-machined Brass with Zirconium plating and Titanium components. Pneumatically-balanced poppet, high-flow case and lever design for easy breathing at all depths and tank pressures. Patented Atomic AFC – Automatic Flow Control. Soft overmolded Rapid Adjustment Knob for manual detuning in special situations such as surf entries or octo use. Patented Atomic Titanium Seat Saving Dynamic Orifice maintains crisp like-new factory tuning and prevents damage during storage. Z3 hose features patented Brass Atomic Comfort Swivel with Black PVD coating. Dual material second stage cover enables entire front to be used for purge. Elliptical exhaust valve dramatically reduces exhalation effort at depth. Dual silicone comfort fit mouthpiece with tear-resistant bite tabs – both comfortable and durable. Z3 optional color kit available.2-YEAR / 300-DIVE SERVICE INTERVAL LIMITED LIFETIME WARRANTY Metal parts are warranted against corrosion for life. Period. The Atomic warranty is NOT contingent on proof of service. And even the recommended service interval of 2 years or 300 dives gives you a lot of dive time before taking your regulator in for a check-up.