Dont lose anymore of your fermenting wine or beer to taking Hydrometer readings. Use this innovative wine thief instead! the sampler allows you to sample your wine or wort with no pouring or siphoning. The innovative bottom valve assembly on this plastic wine thief does it all for you. No waste. No clean up. Manufacturers instructions: 1. Sanitize/rinse your wine/beer sampler 2. Submerge the wine/beer sampler into the carboy and remove 2. Insert Hydrometer or empty sampler into testing jar 4. Measure the specific gravity 5. Return wine/beer to carboy by gently touching tip against the walls of the carboy. In stock and ready to ship. Features: made of plastic. Specifications: Overall length 21. 1 outside diameter.