Scubapro MK25 + S270 Nitrox RegulatorFirst Stage O2 Cleaned first stage Externally Adjustable Intermediate Pressure 4 LP Ports and Dual HP Ports Second Stage Air balanced valve for smooth inhalation at varying depths and pressures. Compact rugged design The exhaust tee is compact and very efficient in minimizing exhalation effort Compact Hi Flow mouthpiece improves airflow
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