It releases carbon dioxide and is suitable for use in the fermentation of honey, white wine, and dairy-based alcoholic beverages, helping to prevent oxidation. [Good Airtightness] The fermentation airlock provides reliable airtight sealing, facilitating efficient fermentation by effectively isolating the interior from outside air and preventing oxidation. Automatically vents gas at room temperature without requiring manual intervention. [Easy to Put On and Take Off] This dust cap features a textured surface design for improved grip and easy handling. Equipped with three internal buckles, it can be securely attached with a simple press down and released by pulling up and twisting. The lid does not require drilling, as it includes a built-in gap for gas release. [Reusable and Versatile] These airlocks are durable and reusable, designed for long-term use. They can be easily cleaned and sanitized by placing them in a standard disinfectant solution for repeated applications. Suitable for a wide range of fermentation projects including beer, wine, sauerkraut, kimchi, cider, fruit wine, rice wine, vegetables such as broccoli and carrots, ginger, kombucha, and other home brewing and food preservation uses. Ideal for pure fermentation processes such as white grape must, mead fermentation, and red wine secondary fermentation. Color: Transparent + Red + Black Material: PP Size: 17 cm Package Contents: 6 x Airlocks 12 x Sealing Rings Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement allows an error of +/- 1-3 cm.