Just half fill with water and you're good to go. Bung Size Base : 26mm.
10 x Fermentation Bubbler Six Chamber Airlocks for Home Brewing Fermenting
6 x Fermentation Bubbler Airlocks & Rubber Bungs Corks Demijohn Wine Beer Cider
3 x Fermentation Bubbler Airlocks & Bored Cork Bungs - Demijohn Wine Beer
6 x Fermentation Bubbler Airlocks & Bored Cork Bungs Demijohn Wine Beer Cider
Almost Off Grid 10 x Bubbler Airlocks and 10 x Bored Rubber Bungs for Glass Demijohns, Homebrewing, Winemaking, Mead, Beer & Cider Making, Fermenting
Airlock & Rubber Bung x 2 - Fermentation Bubbler Combo for Demijohn Fermenter
