Model P4 Rev A Balanced Trim Single Stage Pressure Reducing Regulator; 1/2" Size, Cv=0.60; Brass Body, 6061 Aluminum Spring Chamber; 302 Stainless Steel With PTFE Ring Diaphragm, PCTFE Seat, 316L Stainless Steel Seat Retainer And Poppet, Inconel X-750 Poppet Spring, PTFE Back-Up Ring, Port Configuration H; Reducing Adapator (1/2" MNPT X 3/4" FNPT); 3-250 PSIG Range Spring; 0-300 PSIG Outlet Gauge; 0-600 PSIG Inlet Gauge; Tamper Proof; Relief Valve 50-150 PSIG