Hollis 500SE+DC7 (1st + 2nd Stage)

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  • Regular price $959.95
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The 500SE utilizes a servo controlled valve to provide precision airflow and unparalleled performance for both air and trimix divers in a side exhaust configuration. To achieve this, we have perfected the original "lever-servo valve" we designed 35 years ago. Overbalanced diaphragm first stage also provides ideal hose routing for both backmount and sidemount users and optimum performance regardless of depth.


  • Pneumatically balanced servo valve system
  • Patented Orthodontic Mouthpiece for comfort and reduced jaw fatigue
  • Standard with 30" MiFlex® hose
  • Easily disassembled without the use of tools and underwater if necessary
  • Left or right positioning—no upside-down
  • Boltsnap tie point
  • First Stage Configuration: DC7