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Hollis 212 Second Stage -Features

  • Pneumatically balanced second stage
  • Patented Dynamic Adjustment once set automatically maintains inhalation effort throughout the dive by compensating for depth changes
  • Patented Orthodontic Mouthpiece for comfort and reduced jaw fatigue
  • Easy grip controls for precise adjustment even while wearing gloves
  • Venturi Switch for simple Dive/Pre-Dive modes