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
Homebrew 10 Litre Fermenting Bucket & Lid - Food Grade - Winemaking Cider
Auto Syphon Small For 4.5 litre / 1 Gallon Demijohns And Small Fermenting Bucket
