This 2-pack of fermentation weights is made of clear glass, specifically designed to fit 3.8-inch mouth gallon jars for home fermentation projects. Each weight is sized to be large enough to cover the opening of standard gallon fermenting jars, ensuring that fruits, vegetables, and other fermenting ingredients stay fully submerged in brine or liquid. The clear glass material allows users to easily monitor the fermentation process without removing the weights or opening the jar. The smooth, non-porous glass surface resists mold growth and won’t leach chemicals or alter the flavor of fermented foods and beverages, such as sauerkraut, kimchi, pickles, mead, or cider. The weights fit securely inside 3.8-inch mouth gallon jars, preventing floating ingredients from exposure to air—a critical step for safe, successful fermentation. The 2-pack provides a practical quantity for alternating use or multiple fermentation batches, and the durable glass construction is easy to clean, sterilize, and reuse for future projects.