Natural Cork stopper for 1 gal demijohn / Bored
Bung used in 1 gallon glass jars, Pre bored to take an airlock.
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Cork airlock tapered bung with hole, this will fit most of the traditional glass demijohns, both old and new
Dimensions - Top diameter 32mm, tapering to 28mm.
Cork to allow a snug air tight fitting of any standard size airlock including bubbler style and handy airlocks.