A heavy duty, high density PTFE tape especially recommended for gas lines. Can be used on lines carrying natural gas, propane, water, oil, etc. Thickness is .0035 ± .0005 and density of 1.2 g/cm³ , pressure rating of 10,000 PSI and withstands temperature from –450º F to 500º F. Can be used on oxygen systems. Meets Federal Specification MIL-T-27730A. UL listed.