Their balanced design maintains precise downstream pressure and a diaphragm stop prevents ruptures in the event of surges, Capacity Vol: 4 oz, Inlet Size: 3/8"" (NPT), Operating Pressure: 0, 0 psi Min 125, 0 psi Max, Height: 5-1/2"", Diameter: 3"", Body Material: Die Cast Aluminum, Type: Regulator, SKU: ORSNO42858