Forged brass body and bonnet Easy-to-read single scale 21/2" gauges 21/8" stainless steel diaphragm 1st stage 31/4" stainless steel diaphragm 2nd stage Heavy duty mechanical stem type seat and nozzle assembly Delrin bushing for smooth flow adjustment Fine mesh filter screen between inlet and seat Pressure relief device for low pressure gauge protection only PART# : RVT8013 UPC# : 10106 CGA INLET : CARBON DIOXIDE 320 OUTLET CONNECTION : 5/8"-18(RH) (F) DEL. PSIG : 5-125 REPLACEMENT 21/2" GAUGES : G24; 200 PSI - G23; 3000 PSI