UL-listed high-pressure thermoplastic LPG hoses are leak tested. Brass fittings (3/8" female swivel flare each end). 350-psi working pressure. 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.