Flame King (100383-40 3/8" ID Thermo Plastic Hose Assembly 3/8" ID Thermo Plastic Hose Assembly including a 3/8" MNPT x 1/2" Female Flare Swivel 40" Overall Length Maximum Pressure Rating - 350 PSI; Temperature Range : -40 degree Fahrenheit to 140 (-40 degree Celsius to 60 Celsius) Certification - UL569 Used for LP and Natural Gas