This is a polypropylene coated brass Lever type Water butt tap with a Double Outlet and a polypropylene 3/4" male thread.
Useful for replacing your plastic tap with a more sturdy and reliable polypropylene coated brass tap.
It will screw directly into any 3/4" Female BSP thread which is the most common thread that you will find on a water butt.
A roll of PTFE Plumbers tape is included so that you can make the connection absolutely water tight.
This item enables you to have a permanent connection for garden hose / water timer / irrigation system etc whilst leaving the second outlet free for general use.
3/4"Male  BSP threaded inlet 
3/4" BSP male thread plus water filter and snap on connector for 1/2" garden hose on the first outlet
3/4" BSP male thread plus water filter and snap on connector for 1/2" garden hose on the second outlet