A reliable combination for your underwater air supply: the Scubapro MK25 Evo first stage (DIN or Yoke) together with the D420 second stage.

The MK25 provides a constant and effortless air flow, regardless of depth, bottle pressure and respiratory rate thanks to the air balanced flow-through piston design. The first stage is made of nickel-plated, chrome-coated brass. It offers a 30% higher cold water resistance and delayed ice formation under extreme conditions, owing to the patented Extended Thermal Insulating System (XTIS). HP outlets arranged on opposing sides let you position the first stage either up or down. You will also be able to achieve an optimal, personalised hose routing with the five LP outlets on the 360° rotatable swivel turret.

The uniquely shaped nylon housing with glass fibre reinforcement is a continuation of the D series with the latest advances in regulator technology. The Scubapro D420 second stage is an air-balanced control valve for progressive airflow and it delivers plenty of air with a lightness that resembles breathing on the surface. It features a reversible hose attachment, which lets you attach the reg left or right, thus offering maximum configuration flexibility.