The R 1 PRO O2 1st stage is a balanced piston in a chrome-plated maritime bronze body that provides constant and effortless airflow unaffected by depth, tank pressure, or breathing rate. One high pressure 7/16-inch ports allow the first stage. Four low pressure 3/8-inch ports ports allowed.
The R 1 PRO O2 1st stage is for O2 100% .
Our recommended service interval is every two years or one hundred dives.
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