The airlock has a red dust cap. It is big enough for all 4.5 litre (6 bottle) wine kits.
5 Litre Fermenting Bucket + Handy Airlock + LCD Thermometer Strip
5 Litre Fermenting Brewing Bucket with Lid, Grommet & Fermentation Airlock
25 Litre Fermenting Bucket with Solid Lid - Wine Beer Cider Mead Homebrewing
Homebrew & Winemaking 30 Litre Fermenting Bucket
5 Litre Fermentation Bucket with Solid Lid for Homebrew Cider, Wine, Mead, Beer
5 Litre Food Grade Fermentation Vessel Bucket Bin & Airlock Fermenting Homebrew
