A Complete Brewing Airlock Kit – Get a durable and reusable fermentation solution that offers long-term performance at a great value. This kit includes 6 bubble airlocks, 6 #6 stoppers, and 12 grommets, providing everything you need for effective fermentation. Simply drill a 3/8-inch hole for the grommets or a 1-inch to 1.28-inch hole for the stopper on your lid. High-Transparency Bubble Airlock – Unlike standard S-shaped airlocks, this fermentation airlock is made from high-quality, non-toxic plastic that is more rigid and less prone to breakage. Its superior clarity allows you to easily monitor the entire fermentation process. Improved Dust Cap Design – Features a textured zigzag surface for better grip and prevents slipping when open. The cap includes three internal buckles for a secure snap closure. Gently press down to close and twist to open. The design allows gas to escape without requiring an additional drilled hole in the lid. Reusable and Versatile – These bubble airlock sets are built to last and can be reused multiple times. Ideal for fermenting beer, kombucha, peppers, watermelon, salsa, and other beverages. Provides an economical, oxygen-free environment for all your fermentation needs. Color: As shown in photo Material: Plastic Package Contents: 6 x Twin Bubble Airlock Sets (each set includes airlock, stopper, and grommet) Note: Light reflection and display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm. Only the items listed above are included; other accessories are not part of the package.