Better Brew Rubber bung 31mm x 26mm with drilled hole. Pre-drilled ready to take your airlock.Fits most standard demijohns.SizeTop - 30mmBase - 26mmNB: This Bung has a hole - If you want an undrilled bung, see our other listing for Solid Bungs

Rubber Plug for Airlock - 24/30mm - 9mm hole. 36mm height. Cylindroconical form. Food safe material.

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