This is the Atomic Z3 Regulator 1st Stage 2nd Stage Comfort Swivel for Scuba Diving

Features:

First Stage:

• Chrome Plated Brass and 316-Grade Stainless Steel
  
• Balanced Flow-Thru Piston Design
  
• Atomics Jet Seat High-Flow Piston
  
• Exclusive High-Pressure Piston Seal System is Self-Lubricating
  
• Self-Lubricating for Low Friction and Low Maintenance
  
• No Sharp Edges: Conical Seat and Blunt-End Piston
  
• Precision Machined from an Extremely Strong Aerospace Specification Seat Material
  
• Most Reliable Seat System in the Industry
  
• Seat System: 2-Years or 300 Dives w/o Service
  
• 2 High-Pressure (HP) 7/16 Ports
  
• 5/7 Low-Pressure (LP) 3/8" Ports
  

Second-Stage:

• Balanced Linear Flow Design
• Pneumatically-Balanced Poppet Second-Stage
• Zirconium Plated Brass Demand Valve Body
• Titanium Lever and Sealing Orifice
• Atomics Patented Seat Saving Dynamic Orifice
• High Quality Silicone Rubber Diaphragm
• Unique Diaphragm Activated Vain Automatically Controls the Flow and Venturi-Effect
• New High-Flow Second Stage Case and Magnum Lever Design: Significantly-Lowers Breathing Effort
• Optimum Breathing Resistance at All-Depths
• Soft-Over-Molded Rapid Adjustment Knob for Rare Special Situations
• Atomics Comfort Swivel: 30? Rotational Movement without Binding or Kinking
• Comfort Swivel: All-Titanium with Black PVD Coating
• Dual Material Second Stage Cover for Easier Purging
• Dual Silicone Comfort Fit Mouthpiece with Tear-Resistant Bite Tabs
• Metal Accented Front Cover Ring

Atomic Aquatics most compact and economical regulator system, the Z3 may be one of the least expensive of the Atomic line, but its combination of performance, ergonomics and materials are unmatched by the most expensive competitors. Built upon the B1/T1 platform, it shares the same breathing performance and patented features. The Z3 has all the features of the Z2 and then some.