This hydrometer is used to measure the percentage of alcohol in your homebrew, and is used for distilled spirits—NOT for beer or wine (see my other items, you need the Triple Scale for your mash or sugar wash!).
The scale is about 12" long and 1/2" across the fat end. Weighted with metal shot. This scale goes all the way up to 200 proof, or 100% alcohol. Fine quality glass MADE IN FRANCE
This scale will determine the direct percentage of alcohol in liquids with a specific gravity less than zero. Just put a sample of unsweetened liquid containing alcohol in a test jar (dollar store bud vase, mason jar, or see my other items) and float the hydrometer in the liquid. The hydrometer is blown glass and fragile so be careful not to let it bounce off the bottom or sides. Spin the hydrometer gently to release any bubbles that are sticking to it. At eye level read the number off the scale where the hydrometer emerges from the liquid. Be sure to read across the two bottom corners of the frown (not at the meniscus (top of the curve)).
The rum and plastic test jar are props to show you how it works and are not included! You just get the hydrometer, accordion case, and directions.