S600
Balanced Flow Valve. Increases safety and relaxation on every dive, because it initiates airflow effortlessly and instantly on demand, independent of the tank pressure, in a controlled and natural manner.
Mk25
Balanced piston design. The piston design is an extremely powerful and reliable mechanism that delivers air immediately upon request and provides the same high air flow at all tank pressures and at every depth. In fact airflow even increases slightly towards the end of the dive giving additional support to the tired diver.

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