Tap A.  Polyethelene food grade tap.  8mm outflow. Depth of thread 15mm. Use this tap on most fermenters or drums that already have a moulded thread in the container. Screws straight in.  $6.95 

Tap B. Polyethelene food grade tap. 8mm outflow. Depth of thread 25mm to accommodate a back nut. Use this tap to fit to a fermenter, drum or pail that does not have a moulded thread fitted.  The back nut can be used to tighten the tap to the wall of a container.  $8.50