Optimal Fermentation Solution. This fermentation weight is designed to keep your vegetables submerged under the brine, providing an optimal fermentation environment. High-quality material. The fermentation lid is made of food-grade glass, our glass fermentation weights are safe to use and allow you to submerge fruit and vegetable fermentations in the brine longer and easier. Universal fit. The fermentation lid is 7.2cmx3cm/2.83inchx1.18inch in size and fits most wide-mouth jars regardless of the jar's volume. Good seal. The wide-mouth fermentation lid has a good seal and is easy to place in and remove from your jars, ensuring a good fermentation process. Durable and reusable. The fermentation weight is sturdy and can withstand repeated use, let the wide-mouth glass fermentation weights help you make batches of sauerkraut, tomatoes, carrots, and other fermented or pickled foods. Package includes: 1 Fermentation Weight Note: Please allow minor errors due to manual measurement and different monitors.