The weight is made of premium glass material, for long time to use. Small size but with multiple functions, they can be used for such as wine , craft , 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 - This fermenting lid is made of premium glass materials, and can be used for long time. - Great for sauerkraut, craft , cider, fruit wine, and any vegetable and fruit , the lid fit your demands. - The flat bottom keeps fruits and vegetables under the brine, prevents air bubbles from forming underneath, more reliable and convenient than DIY ones. - Large and heavy enough to keep items submerged under brine for better effect. - Transparent design, small size, easy to use, and this glass weight for fermenting is perfect for most kinds of jars. Package list: 1 x Weight