A Propane gas hose for use with low pressure camping appliances. This would include some gas cookers, fish cookers and even some pop up camper stoves. This hose has a 350 psi working pressure with a 1750 psi burst rating. They have a 3/8" MPT on one end and a 1/2" female flare on the other end.
Typically used on RV's and Travel Trailers to connect the Two-Stage Regulator to the permenant gas piping system.