Features Machined brass body. Polished chrome bonnet. Easy-to-read single scale 2" gauges. 15/8" tri-layered reinforced neoprene diaphragm. Mechanical stem type seat. Calibrated to 50 PSI outlet pressure @ 70°F. Porous metal inlet filter (except CO2 models). Pressure relief device for low pressure flowmeter protection only. CGA / ARGON INLET / 580 OUTLET CONNECTION / 5/8"-18 RH(F) FLOW CAP. (SCFH) / 10-70 FLOWMETER TUBE COVER / UAF22 TUBE / UCF18 GAUGES / G7S; 5000 PSI IMENSIONS / Depth: 2 1/ 4" Width / 7 1/2" Height / 7" Weight / 3 1/2 lbs