North Mountain Supply 2-in-1 Wine Thief-Testing Cylinder with Triple Scale Hydrometer. Place Hydrometer into Wine Thief for easy reading and less transfers - Fit most standard size Hydrometers. Fast and Easy to Use : Insert thief into wine and allow to fill up about half way, and gently drop hydrometer into the thief. Once you have your results, press the tip of the thief to the side of the container to drain it. Made in Italy! To promote a positive and satisfying customer experience, this product is covered by North Mountain Supply's 30 day hassle-free replacement program, in the event the product is damaged or defective.