Camco's 15" Pigtail Propane Hose Connector is designed to connect a propane cylinder to an RV or trailer propane regulator

It has a ACME nut x 1/4" inverted male flare

It is 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

You can use the pigtail hose with a 20 lb or 30 lb refillable propane tank and connect it to a regulator or 4-Port Brass Tee

It can also be used to connect to an installed 4-Port Tee as an auxiliary propane supply