Pipe Nipple, Application Air, Gases, Non-Potable Water, Oils, Finish/Coating Galvanized, Fitting Compatibility Not Applicable, Inside Diameter 5/8 in, Manufacture Location Made in USA, Material Steel, Material Grade Grade B, Maximum Operating Pressure 150 psi @ 150 Degrees F, Maximum Operating Temperature Not Applicable, Maximum Steam Pressure Not Applicable, Metal Pipe Construction Welded, Minimum Operating Temperature Not Applicable, Nominal Pipe Size 1/2 in, Outside Diameter 27/32 in