Carbon Weld Nipple Application Air Natural Gas Non-Potable Water Oil Steam Finish/Coating Black Fitting Compatibility Schedule 80 Inside Diameter 3 53/64 in Manufacture Location Made in USA Material Steel Material Grade Grade B Metal Pipe Construction Welded Nominal Pipe Size 4 in Outside Diameter 4 1/2 in Pipe Weld Type Continuous Weld Schedule Schedule 80 Side A Connection Type Close Thread Side A Gender Male Side A Thread Type NPT Side B Connection Type Close Thread