Uniweld RUH8214 Medium/Heavy Duty Single Stage Argon Regulator with a CGA580 Inlet 2" Tri-layered reinforced neoprene diaphragm. CGA580 Inlet, Maximum Inlet:3000 PSIG Large Brass T-handle for Smooth, Acccurate Adjutments. Externally serviceable reseating pressure relief device (PRD). PRD not designed to protect downstream equipment. Delivery Pressure: 5-125 PSIG