★ Food Grade Silicone ★ The airlock grommet is made of thicker silicone and PBA free. 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
★ Fit For 5/8" Hole ★ External diameter is 5/8"(15.93mm). Internal diameter is 3/8"(9mm). Height is 0.3 inch(8mm). Need to drill a 5/8" hole in a fermenter lid. And then this airlock grommet is easily insert in lid hole
★ 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
★ 100% Satisfaction ★ We aim to provide the highest quality service and the best product quality for each customer. Place your order without any worry. If you have any question, please feel free contact us. We will unconditionally solve for you!