NIPPLE, APPLICATION AIR, NATURAL GAS, NON-POTABLE WATER, FINISH/COATING BLACK, FITTING COMPATIBILITY SCHEDULE 40, MANUFACTURE LOCATION GLOBALLY SOURCED, MATERIAL STEEL, MATERIAL GRADE GRADE B, MAXIMUM OPERATING PRESSURE 300 PSI @ 150 DEGREES F, MAXIMUM OPERATING TEMPERATURE 350 DEGREES F, MAXIMUM STEAM PRESSURE 150 PSI @ 350 DEGREES F, METAL PIPE CONSTRUCTION WELDED, MINIMUM OPERATING TEMPERATURE -20 DEGREES F, NOMINAL PIPE SIZE 4 IN, OUTSIDE DIA