1st Stage Regulator Spec: - Maximum working pressure 3500PSI (232BAR). - Intermediate pressure output balanced piston 135-145PSI - Four 3/8-24 UNF-2B intermediate pressure ports - One 7/16-20 UNF-2B high pressure ports - Chromium plated bass body - Stainless steel springs. - Weight: 537 grams. 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.