Vented Rubber Demijohn Bung Cork, 43mm/ 40mm

This white vented rubber bung cork (43 mm / 40 mm) features a central hole for standard airlocks, providing an airtight seal for any container with a minimum neck diameter of 40 mm. Please note: it is not compatible with the demijohns we stock.

Crafted from premium, food-grade rubber, its elasticity ensures a snug, leak-proof fit; the precisely formed aperture allows fermentation gases to escape while keeping contaminants at bay; and the smooth, non-porous surface makes sanitisation and cleaning effortless, ensuring reliable, repeatable performance time after time.

Key Features

• Central vent hole: Designed to accept standard airlocks or fermentation fittings, promoting safe gas release and contamination control.
• Premium rubber construction: Food-grade, durable and flexible for a secure seal in a range of container necks.
• Professional appearance: Crisp white finish suits both personal and commercial environments.
• Easy to sanitise: Smooth, non-porous surface allows quick cleaning and repeated reuse, offering excellent value over time.