Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information; 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed. 3.Hydrometer: 0-100 Tralles. 4.This hydrometer lets you easily calculate percentages, the gradient ribbon helps you know when fermentation is done, and the font is very easy to read. 5.Made from glass, rosin, wax and iron sand, not suitable for wines with high concentrations of sugar or other ingredients. Specifications: Material: Glass & Plastic Color: Transparent Size: Hydrometer: 192x193x197mm/7.56x7.6x7.76inch (Length) Test Jar: 248mm/9.76inch (Height) Weight: 353g Package include: 3 x Hydrometer 1 x Plastic Test Jar