A Complete Brewing Airlock Kit – This fermentation airlock set includes 6 bubble airlocks, 6 #6 stoppers, and 12 grommets for long-term use. Designed for durability and clarity, these components are ideal for home brewing applications. Drill a 3/8-inch hole for grommets or a 1-inch to 1.28-inch hole for stoppers on the lid. Improved High Transparency Bubble Airlock – Made from high-quality, durable plastic, this airlock offers superior transparency compared to standard S-shaped models, allowing clear visibility of the fermentation process. Apply pressure slowly when inserting into the drilled stopper to ensure longevity. Ideal for wine, beer, and other fermentation projects. Enhanced Cap Design – Features a zigzag surface pattern for better grip and anti-slip performance. The cap includes three internal buckles that allow secure closure with a snap. Simply press down to close and pull up to rotate open. The design allows gas to escape without requiring additional drilling in the lid. Reusable & Versatile Use – Constructed for repeated use, this airlock set is sturdy and reliable. Suitable for fermenting beer, kombucha, peppers, watermelon, salsa, and other beverages. Provides an economical and oxygen-free environment for fermentation. 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 the image and actual item. Measurement tolerance: ±1–3 cm. Only the items listed are included; all other products are not part of this package.