Features： 1. The organic silicone fermentation cover can be used for a long time, has no peculiar smell, no BPA, does not fade under daily temperature. 2. Suitable for dishwashers, and can also be easily washed by hand, without time-consuming and labor-intensive maintenance. 3. The fermentation tank lid, 8.6cm / 3.4inches in diameter, suitable for fermenters for making sauerkraut, from cabbage to carrots, cucumbers, tomatoes, garlic, radishes & more, ferment your own sauerkraut, pickles, kimchi & more and can also be used to store coffee beans. 4. Package includes 5 silicone fermenting lids, with or without 5 metal rings, depends on your choices. 5. Try out fermenting and become a probiotic vegetables maker with the best supplies. Specification Material: Silicone, Steel Color: Multicolor Size: 8.7cm / 3.4in Weight: 100g, 150g Package Include: 5× Silicone Fermenting Lids or 5× Silicone Fermenting Lids 5× Metal Rings Made of high quality material, durable and practical to use. Perfect functions,give you a wonderful experience. If you have any questions, please feel free to contact us, we will solve it for you. Every customer can enjoy 30 days refund or replacement for Damaged/Quality Issues. Silicone Fermentation Lid, Anhydrous Airlock Fermented Pickles (No Jars).