This Triple Scale Hydrometer is the used to measure specific gravity, brix, and potential alcohol percentage in your brew. Hydrometer readings can also be used to determine alcohol content by taking a reading before and after fermentation. In addition, it can be used to monitor the progression of fermentation in your wine, beer, hard kombucha, cider, and more! The package comes with a triple scale hydrometer, a step-by-step direction guide on how to do gravity readings and use your hydrometer, and a conversion table. The conversion table helps you understand all three scales, including specific gravity of liquids, BRIX (sugar content), and potential alcohol.