Silicone Bung 17.5mmx22.5mm 9mm Hole
Silicone Bung 17.5 x 22.5 Bored for Airlock / Blow Off Tube
This bung is made from lead free curing silicone. Suitable for all food and beverage contact.
Suited to fit your standard KL20947- 500ml amber glass bottles if you're a uber micro/nano brewer