Balanced-piston first stages are the first choice of demanding deep sport divers and professionals. First stages with air balanced pistons deliver significantly more air to the second stage than any other first stage, while their performance is totally unaffected by changing tank pressure and depth. A balanced piston allows the use of lighter and more sensitive components, resulting in an ultra-fast breathing response, instant delivery of air on demand and extra-high air flow, especially in low tank pressure ranges.
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