MAIN PAGE > REGULATORS > APEKS NITROX REGULATORS 0.00 € XTX40 NITROX D.I.N DS4 The Apeks XTX40 DS4 Nitrox / Oxygen Regulator is designed specifically for use with gas mixtures containing greater than 40% oxygen, upto 100%. It is ideal for use as a stage or decompression regulator. The DS4 features 4 MP ports and 1 HP port, which gives it it's small and compact size. p. Price: 0 €