Check the listing for details. KO Specific Gravity Hydrometer Scale for Light Liquids TEMP 60°/60°F. Condition: Used, Made in United States. Listed at 34.99 USD. Description:This vintage glass brew and mash tester is a classic beer hydrometer used to measure specific gravity during the brewing process. Calibrated at 60 degrees Fahrenheit, it helps monitor sugar content and fermentation progress in homebrewing or traditional beer production. A great tool for brewers or collectors of vintage lab and brewing equipment.Specifications:Type: Brew and Mash Tester / Beer HydrometerCalibration: 60°FScale: Specific GravityMaterial: GlassUse: Beer Brewing, Fermentation, CollectingFeatures:Specific gravity scale for brewing accuracyCalibrated at 60°F for standard brewing conditionsVintage glass constructionIdeal for homebrewers or as a collectible display pieceUseful for tracking fermentation and alcohol potential .