Better Brew Rubber bung 26mm - 31mm with drilled hole. Pre-drilled ready to take your airlock.Fits most standard demijohns.SizeTop - 31mmBase - 26mmNB: This Bung has a hole - If you want an undrilled bung, see our other listing for Solid Bungs

Patent Bottle Cap (Swing Top) with gasket 40mm

Silicone plug for airlock 226/32mm with 9mm hole. Cylindroconical form, 26mm diameter in one end and 32mm in the other.

Damejeanne Rubber Cap 40mm with hole Fits most demijohns with 35-45mm opening.

Damejeanne Rubber Cap 50mm with hole. Fits demijohns with 45-55mm opening.