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

This listing is for a single rubber bung with hole to be used in conjunction with an airlock in a glass demi-john or fermentation carboy.

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.

Please Note that these bungs are not suitable for use with the 5 litre glass demi-johns with ovaled necks that we are currently selling.