Master Plumber, 1/2" x 260", Yellow Gas Line Pipe Thread Seal Tape, For Ferrous & Non Ferrous Fittings In Gas Pipelines, Cylinders & Containers, Suited For All Threaded Connections Involving Gas Line Installations For Natural Gas, Propane, Butane &/Or Water, Oil & Chemicals, Withstands Up To 10,000 PSI & Temperatures Of -450 Degrees Fahrenheit To 550 Degrees Fahrenheit, Bagged.