NIPPLE, APPLICATION AIR, NATURAL GAS, NON-POTABLE WATER, FINISH/COATING BLACK, FITTING COMPATIBILITY SCHEDULE 80, MANUFACTURE LOCATION GLOBALLY SOURCED, MATERIAL STEEL, MATERIAL GRADE GRADE B, MAXIMUM OPERATING PRESSURE 2000 PSI @ 150 DEGREES F, MAXIMUM OPERATING TEMPERATURE 550 DEGREES F, MAXIMUM STEAM PRESSURE 300 PSI @ 550 DEGREES F, METAL PIPE CONSTRUCTION SEAMLESS, MINIMUM OPERATING TEMPERATURE -20 DEGREES F, NOMINAL PIPE SIZE 4 IN, OUTSIDE