Miyuki S It is balanced. ???Balanced piston delivers ample air volume at stable intermediate pressure to the second stage over a wide range of supply pressures. ???Spring chamber is environmentally sealed to maintain cleanliness reducing the effects of corrosion and contamination. ???Dry-sealed first stage uses no liquids or gels that can leak or add to service costs. ???Tee - shaped design reduces regulator profile when mounted on tank. ???Four LP ports and two HP ports for ideal hose positioning. ???Nitrox compatible up to 40%

Frank L For 2013, the first stage is the same for the Blizzard, Oasis, and Brut/Magnum.

ALEXANDER D No it's a Sherwood first stage.