Nipple, Application Air, Natural Gas, Oil, Potable Water, Steam, Fitting Compatibility Class 150, Gravity Flow No, Inside Diameter 1 1/2 in, Material Red Brass, Material Grade ASTM B43, Maximum Operating Pressure 184 psi @ 450 Degrees F, Maximum Operating Temperature 400 Degrees F, Maximum Steam Pressure 731 psi @ 300 Degrees F, Metal Pipe Construction Seamless, Minimum Operating Temperature -20 Degrees F, Nominal Pipe Size 1 1/2 in, Outside Diameter 1 7/8 in, Overall Length 1 3/4 in