Pipe Nipple Assortment, Application Air, Fuel, Water, Finish/Coating Galvanized, Fitting Compatibility Schedule 40, Included Lengths (6) 2 1/2 in, (6) 2 in, (6) 3 1/2 in, (6) 3 in, (6) 4 1/2 in, (6) 4 in, (6) 5 1/2 in, (6) 5 in, (6) 6 in, (6) Close, Material Steel, Maximum Operating Pressure 1145 psi @ 650 Degrees F, Maximum Operating Temperature 600 Degrees F, Maximum Steam Pressure 1145 psi @ 650 Degrees F, Metal Pipe Construction Welded, Minimum Operating Temperature -20 Degrees F