Ideally suited for all threaded connections involving gas line installations for natural gas, propane, butane, and/or water, oil, and chemicals. Withstands up to 10,000 P.S.I. and temperatures of -450 deg. F. to +550 deg. F. Full 1.6 density. .0035 thickness plus .0005″. Meets MIL T-27730A specification. 1 spool per header card bag.