Camco 59183 Olympian 48" Type 1 Acme to 1/4"IMF Propane Pigtail Hose - 1pk For connecting propane cylinder to RV or trailer propane regulator. Rated for 200,000 BTUs per hour. Safety features include thermal protection in case of fire and excess flow protection in case of broken gas line. Type 1 ACME nut x 1/4? inverted male flare.