Model P7, Rev A, High Flow/Sensitivity Pressure Reducing Regulator; 1/2" Size, Cv=0.8; Brass Body, Trim, And Spring Chamber; TFE Main Valve Seat, CTFE Vent Valve Seat, Porting Configuration W; FNPT End Connection; 50-1500 PSIG Range Spring; No Outlet Gauge; Cleaned For Oxygen Service Per Spec #S-1134