Silicone cork/plug with hole is designed for adding airlock to a standard beer growler bottle and fermenter apertures in lids. This bung made from lead-free curing silicone. Therefore, suitable for all food and beverage contact.
- 25mm tapering to 38mm. It is suitable for growlers and demijohns for 35mm hole internal diameter.
- 17.5mm tapering 22.5mm. Suitable for beer bottles or smaller 20mm bottle mouth size holes.
Both corks have an 9mm hold in the center is ideal to attach airlock, blow off tubes, pipes, and other bottle attachments of your projects.
Please sanitize and wet the cork before inserting the airlock. We keep it deliberately tight for an airtight fitting.