A Complete Brewing Airlock Kit – This kit includes 6 bubble airlocks, 6 #6 stoppers, and 12 grommets for long-term use. Designed for durability and clarity, the improved high-transparency airlock allows clear visibility of the fermentation process. Made from durable, non-fragile plastic, it resists breakage and provides reliable performance. The airlock features an improved dust cap with a zigzag surface design to prevent slipping when open. Internal buckles allow for secure closure with a snap; simply press down to close and pull up to open. The cap allows gas to escape without requiring additional drilling. Reusable and versatile, these airlocks are suitable for fermenting beer, kombucha, peppers, watermelon, salsa, and other beverages. They offer an economical, oxygen-free solution for home 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 variation. Measurement error is +/- 1-3 cm.