The Propane Refillable Adapter Gauge is designed to convert all existing UK propane (POL) gas connections to fit the Gaslow Refillable Cylinder. The adapter can be used to convert either a propane regulator or hose connection to fit the 21.8 LH connection on the Gaslow Refillable Cylinder. It comes complete with a Gaslow Gauge that gives a visual warning of low gas levels when gas is being consumed by your appliances.