Balanced 2nd Stage RegulatorMODEL NO: AS-201 ADJBalanced 2nd stage regulator150psi maximum intermediate pressure1.0~1.2 CIW (column inches of water)-inhalation effort (ADJ-KNOB ON MAX)1.1 CIW exhalation effort30+ SCFM (air supply:3000psi)Weight : 251 gramsADJUSTABLE