Specialty Gas Regulator, Regulator Supply Type Cylinder, Gas Service Hydrogen, Stages Two Stage, Inlet Connection CGA-350, Outlet Connection 1/4 In. Hose Barb, Delivery Pressure Range 0 to 125 psi, Gauge Size 2 In., Supply Pressure Gauge 4000 psi, Max. Inlet Pressure 3000 psi, Body Material Chrome Plated Brass, Diaphragm Material Neoprene, Body Dia. 2.125 In., Includes Outlet Needle Valve and Relief Valve, Standards CGA E-4 Category: Welding -- Gas Welding Equipment and Accessories UPC 725636315143 Size One Size Brand Name Harris Unit Count 1.0 Count Item Weight 6 Pounds Manufacturer HARRIS Material Type Brass Manufacturer Part Number KH1022