With left-hand threads. Use to connect propane cylinder to inlets of regulator Models 315244 and 315236. Thermoplastic hose and solid brass end fittings. UL- and CGA-listed. 20"L. California Proposition 65 WARNINGBrass nozzles, quick connects, sprayer nozzles, hose fittings connectors, clamps, and couplings contain lead, a chemical that is known to the state of California to cause cancer, birth defects and other reproductive harm.