A Complete Brewing Airlock Kit Get a durable and cost-effective solution for long-term fermentation needs. This kit includes 6 bubble airlocks, 6 #6 stoppers, and 12 grommets. Designed for easy setup: drill a 3/8-inch hole for grommets or a 1-inch to 1.28-inch hole for stoppers on the lid.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. Enhanced clarity allows you to clearly monitor the entire fermentation process. Apply steady pressure when inserting into drilled holes; these airlocks are built to last with top-quality transparency.Improved Dust Cap Design Features a textured zigzag surface for better grip and prevents sliding when open. Includes 3 internal bucklesgently press down to snap closed, pull up and rotate to open. The cap allows gas release without requiring additional drilling in the lid.Reusable & Versatile Use These solid bubble airlock sets are reusable and built for long-term performance. Ideal for fermenting beer, kombucha, peppers, watermelon, salsa, and other beverages. Provides an economical, oxygen-free environment for your fermentation projects.Color: As shown in photo Material: Plastic Package Contents: 6 sets x Twin Bubble Airlock Note: Light reflection and display differences may cause slight color variations between image and actual item. Measurement tolerance: +/- 13 cm. Only the listed items are included; other products are not part of this package.