The Highland by XS Scuba Compact DIN First Stage is a non-balanced, reliable and simple flow-by fail safe piston design that is factory set at 135 to 145 psi (9.3 to 10 bars) intermediate at 3000 psi (200 bars) cylinder pressure. Compact, low profile first stage Flow-by piston design One HP and two MP ports pressure ports Factory set I.P. at 135 to 145 psi at 3000 psi Direct attachment to 200 or 300 bar DIN connection Includes Delrin DIN Cap Clean for pre-blended nitrox up to 40% 02