Vented Tapered Demijohn & Bottle Cork, 45mm/ 37mm

This natural vented tapered cork bung (37 mm small end / 45 mm large end) features a central vent hole to accommodate standard airlocks, providing an airtight seal for any container with a neck diameter of at least 37 mm.

Crafted from premium, sustainably sourced cork, its tapered profile expands to fit a variety of openings while the central aperture allows fermentation gases to escape without admitting contaminants. Cork’s natural elasticity, low moisture uptake and antimicrobial properties ensure your contents remain pure and flavours uncompromised—ideal for home brewing, winemaking, bottling and laboratory use.

Key Features

• Central vent hole: Precisely formed to accept standard airlocks or fermentation fittings for safe gas release and contamination control.
• Tapered design: 37 mm to 45 mm profile adapts to various neck sizes, ensuring a snug, leak-proof fit.
• Premium cork material: Naturally elastic, impermeable and antimicrobial, creating a reliable airtight seal.
• Sustainable & reusable: Eco-friendly cork harvested responsibly and suitable for repeated use.
• Versatile application: Perfect for fermentation vessels, storage bottles and laboratory containers.