• Air-balanced diaphragm MK11 first stage design delivers constant and effortless airflow unaffected by depth, tank pressure, or breathing rate
• Marine grade brass body has sealed internal parts to prevent water and pollutants from fouling the inner mechanism while enhancing cold-water performance
• Air-balanced second stage valve smoothes out the inhalation effort at varying depths and supply pressures
• Compact C370 second stage fiberglass reinforced nylon casing with new exhaust tee takes up little space in a dive bag