* High quality Silicone .The airlock grommet is made of thicker silicone It features a higher quality. Also our silicone grommet is high-temperature resistant. It can withstand Not over 300 ℉.
* Good Sealing .This silicone grommet work with the airlock, it makes a perfect air-tight seal to keep bugs/bacteria/ oxygen from getting in your fermenter.That will help maintain the ferment for a longer period
* Widely Application.The fermenter grommets are great for airlocks & plastic buckets lids & straws.Use these silicone grommet to convert mason jars to air locked fermentation vessels.