Vented Silicone Bung - Blue Top, #7

Silicone bung with vented blue top. #7 size - fits most glass carboys, and other containers. Fermenting/ventilating bung - use in place of a bung + airlock. The silicone flap allows carbon dioxide to escape, but keeps air out. Excellent for bulk aging.

Top diameter: 1 7/16" (36 mm)

Bottom diameter: 1 1/8" (29 mm)

Height: 1 3/8"