Brass Fulham nozzle hose connectors for 8 mm/5/16" bore hose (10 mm o.d. x 10 mm o.d.). 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.