Purging Regulator, Maximum Delivery Pressure 500 PSI, CGA Connection Outlet 1/4 Inch 37 Degrees Flare, Gas Service Inert Gas, Gauge Size 2.0 Inches, CGA Connection Inlet Nut 0.960-14 Inch Right Hand Male, Weight 3.23 Pounds, Series TPR250-500-580, Body Diameter 2.5 Inches, Overall Length 6.5 Inches