A Complete Brewing Airlock Kit Get a durable and cost-effective solution for long-term fermentation needs. This airlock combo includes 6pcs bubble airlocks, 6pcs #6 stoppers, and 12pcs grommets. Drill a 3/8 inch hole for grommets or 1 inch / 1.28 inch hole for stoppers on the lid.Improved High Transparency Bubble Airlock Unlike standard S-shaped airlocks, this fermentation airlock is made from high-quality, non-toxic material that is more rigid and less prone to breakage. Offers superior clarity to easily monitor the fermentation process. Apply pressure slowly when inserting into drilled stoppers for a secure, long-lasting fit.Enhanced Cap Design Features a textured zigzag surface for easy handling and a secure open position. Includes three internal buckles for a snap-on closure. Simply press down to close and lift and twist to open. The vented design allows gas to escape without requiring additional drilling in the lid.Reusable & Versatile These bubble airlock sets are sturdy and reusable, designed for extended use. Ideal for fermenting beer, kombucha, peppers, watermelon, salsa, and other beverages. Provides an economical, oxygen-free environment for all your fermentation projects.Color: As shown in photo Material: Plastic Package Contents: 6 x Twin Bubble Airlock Sets (includes airlock, stopper, and grommet per set) Note: Light reflection and display differences may cause slight color variation between the image and actual item. Measurement may vary by +/- 1-3 cm. Only the items listed are included; other accessories are not part of the package.