Bouchon D'orifice a vis

This bouchon antipoussière with chain fits a bayonet or mini hole and prevents dirt from entering the bottle. It also serves as an additional seal for the filling valve.

• The description claims that the bouchon antipoussière prevents dirt from entering the bottle and can prevent the filling valve from closing if dirt gets inside.
• The description claims that the bouchon antipoussière acts as an additional seal for the filling valve.