This vintage beer or wine making glass hydrometer from Southern Vineyards in Brighton is a manual handheld tool used to measure the density of liquids, specifically in the brewing of beer or wine. The 12-inch clear glass hydrometer is easy to clean and is a vital piece of equipment for any home brewer or winemaker looking to ensure the quality of their final product. Perfect for those looking to add a touch of nostalgia to their home brewing or winemaking setup, this hydrometer is a reliable and essential tool for any wine or beer-making enthusiast.