High-quality polished brass tap. It makes a stunning finish to any water butt or water tank.
Complete with hosetail (nozzle) for fitting to 3/4" hose.
Alternatively, the hosetail can be unscrewed, then you can use a male hoselock connector/reducer to connect the tap to a 1/2" garden hose with a male click connector already attached. See this blog post for details: how to attach a garden hose to a metal water butt tap.