The fermentation weight is made of glass material, durable for long time to use. Small size but with multiple functions, they can be used for various fermentation projects such as wine brewing, craft beer brewing, sauerkraut, cider, fruit wine, rice wine, carrot and ginger. Reasonable structure, easy to grip, save your efforts and bring you convenience. Features -Color:Transparent -Material:Glass -Size:7.00X7.00X3.00cm/2.75X2.75X1.18in - Small handle design makes it easy to take these weights out of your Mason Jars and offer a much more stable solution than other grooved weights. - This fermenting weight is made of glass materials, durable and can be used for long time. - Great for sauerkraut, craft beer brewing, cider, fruit wine, and any vegetable and fruit fermentation, the fermentation weight fit your demands. - Large and heavy enough to keep items submerged under brine for better fermentation effect. - Transparent design, small size, easy to use, and this glass weight for fermenting is perfect for most kinds of mason jars. Package list: 5 x Fermentation Weights