1st Stage Regulator Spec: - Over-balanced diaphragm design delivers superior breathing performance even at increased depths. - Made with corrosion resistant marine chrome plated finish. - Ventilation rate (air supply / 3000psi) : 135 SCFM - Intermediate pressure: 135 - 145 psi (9.5 - 10.2 bar) - High pressure port: (7/16"-20 UNF) x 2 - Low pressure port: (3/8"-24 UNF) x 5 plus swiveling turret. 2nd Stage Regulator Spec: - Downstream demand valve with external air intake adjustment. - 150PSI maximum intermediate pressure - 1.2 to 1.4 CIW (column inches of water) - inhalation effort - 1.1 CIW exhalation effort - 30+SCGM (air supply: 3000psi) - Weight: 203 grams - Non-Adjustable.