Scubapro MK25 - S555 Nitrox M26

A powerful all-rounder. Our top performing balanced piston first stage, paired with our S555 air balanced second stage, is the ideal choice for a diver wanting a high performance yet simple to operate system, remarkably durable and reliable compatible with EU norms EN 13949:2004 & EN 144-3:2004.

S555 is a compact and lightweight air balanced second stage marrying advanced breathing performance with a captivating design. It increases fun and relaxation on every dive because it initiates air flow effortlessly and instantly on demand, independent of the tank pressure. As with all of the X and S series second stages, S555 features a super-flow hose for smooth air delivery.

Nitrox (oxygen enriched air) is the term used to describe breathing gases made of oxygen-nitrogen mixes with the oxygen percentage higher than 21% (air). SCUBAPRO introduces two fully dedicated Nitrox systems (MK25 S555 Nitrox & MK2 R295 Nitrox) based on our piston first stages and developed in compliance with the most stringent safety norms on breathing apparatuses for use in the EU.