*** Brew Tapper is the ONLY Authorized Seller. *** Best Homebrew Hydrometer. Essential piece of your Home Brew equipment for ABV Testing.;Color bands indicate start and finish for wine and beer (Dessert Wines, Table Wines, and Beer);Calculate alcohol, see when the fermentation is finished and troubleshoot problems.;Triple Scale: Specific Gravity (0.99 - 1.17), Potential Alcohol (0%-20%), Brix/Balling (0-35);Backed by a Lifetime - No Hassle - Free Replacement Guarantee, if inaccurate!