Description
The Solid Bung 37–45mm is a silicone stopper designed for compatible demijohns and fermentation vessels. Its tapered shape measures approximately 37mm at the narrow end and 45mm at the wide end, allowing it to fit vessel openings that require this bung size.
Unlike a bored bung, this solid version has no centre hole. Therefore, it provides a simple way to close a compatible vessel when you do not need to fit an airlock or other equipment through the bung.
Solid Bung 37–45mm for a 5L Glass Demijohn
The Solid Bung 37–45mm fits our 5L Glass Demijohn with Cap. Its tapered design allows the bung to sit securely in the demijohn opening when you need a solid stopper.
You can also use the bung with other compatible vessels that require a stopper within this size range. However, vessel openings can vary. Always check the 37–45mm tapered dimensions against your vessel before use.
Solid Silicone Bung with No Centre Hole
This bung uses a simple solid design without a bored centre. As a result, it suits applications where you want to close the vessel without inserting an airlock through the stopper.
The silicone construction also gives the bung a simple one-piece design. In addition, you can easily remove it when you need access to the vessel.
Choosing the Correct Bung Size
Bungs use a tapered shape, so both measurements matter when checking the fit. This bung measures approximately 37mm at the narrow end and 45mm at the wide end.
Before choosing a bung, measure the opening of your demijohn or fermentation vessel. Then compare that measurement with the bung dimensions to make sure you have the correct size.
For more fermentation vessels, stoppers and related equipment, browse our Carboys, Demijohns & Bungs range.
Specifications
- Type: Solid bung
- Material: Silicone
- Size: 37–45mm
- Shape: Tapered
- Centre hole: No
- Suitable for: 5L Glass Demijohn and other compatible vessels requiring this bung size




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