The Hollis DC7 first stage and 500SE second stage combine to create a regulator set that delivers exceptional performance and reliability. The 500SE features a servo-controlled valve, ensuring precise airflow and unmatched performance, perfectly complementing the over-balanced diaphragm design of the DC7.

Equipped with 2 high-pressure and 4 low-pressure ports, the DC7 allows you to customize your hose routing for back-mounted or sidemount configurations, giving you maximum flexibility and convenience.

This regulator set performs consistently, regardless of depth or remaining tank pressure. An environmental seal protects the first stage from internal corrosion, contaminants, and icing, making the Hollis DC7/500SE an excellent choice for cold-water diving.

Key Features:

• High-performance over-balanced first stage
• 2 high-pressure (HP) and 4 low-pressure (LP) ports
• Environmental sealing for enhanced durability
• Pneumatically balanced servo valve for precision airflow