Type Size Color Quantity Product Specifications: NITROX REGULATOR 2010 NITROX DS4 XTX 40 REG M26 SRP £252.58 We offer a range of regulators suitable for use with Nitrox and Oxygen (also known as oxygen enriched air or EAN). As they leave the factory standard Apeks regulators are suitable for use with oxygen enriched gases ( i.e. Nitrox etc.) providing the oxygen content does NOT EXCEED 40%*. Click to view close-up picture of this product Click to view close-up picture of this product For mixtures containing more than 40% Apeks Nitrox regulators are specially made and assembled at our factory and are suitable for 100% oxygen use. Standard Apeks regulators can be professionally converted to oxygen service and oxygen compatibility kits are available to Apeks dealers together with instructions for O2 use.