Rubber Bung To Fit Glass Demi-John With Hole For Airlock - Single

This bored rubber bung has a hole designed to take an airlock and is designed for use with a Glass Demi-John. It also fits fermentation carboys designed for use with bungs.

The size of our bungs are 27mm base diameter x 31mm top diameter, and they are 32mm high. Drilled with an 8mm hole to take an airlock. All measurements approximate.

Care should be taken never to stopper a Demi-John that may have pressure build inside the vessel.