Brew Tapper Triple Scale Hydrometer for Beer, Wine, Mead & Kombucha - Specific Gravity ABV Tester *** 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!