Attaches to butane cylinders with 21mm clip-on valve. H.50 nozzle for standard 8mm gas hose. Operating pressure 29mbar and 1.5kg/hr max flow rate. Ideal for camping, gas cookers, barbecues and patio heaters. Compatible with Calor gas 7kg and 15kg and Flogas Yellow 4.5kg, 7kg and 13kg.