SCUBAPRO'S Mark 17 balanced diaphragm first stage is designed for harsh environments and cold water. The pneumatically balanced G-2-60 second stage is made with metal components in the inlet tube, orifice, inhalation control knob and hose connector to optimize cold-water performance. It is quipped with both a VIVA switch and inhalation control knob, and the left-right hose attachment makes it easy to rig for tech diving.

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