Marshall Excelsior MEC ME398 excess flow male soft-nosed POL x 1-5/16" ACME. All brass construction. Excess flow means that gas only flows one way through the adapter -- from the tank.
Adapter to convert a CGA 510 POL cylinder valve to be used with Type 1 QCC appliance side with swivel nut fitting. In English that means converting an older propane bottle to accept the new-style fittings.
If you want the best and safest gas connections, Marshall Excelsior is the brand you want. Lifetime warranty!! Warranty exchanges are instantly done by us. No dealing with the manufacturer.