You cannot breathe directly out of a scuba tank because of the high pressure. A regulator reduces pressure to safe a level that can be inhaled by the diver. A diving regulator has two parts: the First Stage reduces the tank pressure and connects it to the Second Stage which contains the mouthpiece for breathing

Scubapro Mark 11 Regulator, First Stage Only


Out of Stock

Feature1Balanced diaphragm
Feature2Chrome plated brass body
Feature3Cold water Anti-Freeze protection & Dry chamber
Feature4Low pressure ports 4 (2 HFP), High Pressure Ports 2
Feature5Externally adjustable intermediate pressure

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