10 mm o.d. x 10 mm o.d. (for 8mm/5/16″ bore hose) brass Fulham nozzle hose connection. By sliding back the knurled collar, one hose nozzle is released. As the coupling is hose to hose it is useful for barbecue and patio heater assemblies. Body of the coupling is “valved” internally with direction of flow towards loose nozzle. For LPG only