Nipple Application Air Natural Gas Oil Potable Water Steam Fitting Compatibility Class 150 Gravity Flow No Inside Diameter 1/4 in Material Red Brass Material Grade ASTM B43 Maximum Operating Pressure 201 psi @ 450 Degrees F Maximum Operating Temperature 400 Degrees F Maximum Steam Pressure 282 psi @ 450 Degrees F Metal Pipe Construction Seamless Minimum Operating Temperature -20 Degrees F Nominal Pipe Size 1/4 in Outside Diameter 35/64 in Overall Length 4 in