The measured liquor pourer is made of premium material to its durability and high quality. This product fits on most standard liquor bottles and serves as a wine pourer and stopper. It provides an effortless way to reduce over-pouring and spilling, which is a convenient and practical tool. These liquor pourer is great for employing in place such as home, espresso shop, bars, club and restaurant. Operating Instructions for Quantitative Wine Spout: Step 1: Please shake the pouring spout before use to that the steel ball will not get stuck. : Adjust the bottle to a wide angle (about 60 degrees) when pouring. Step 3: Pour again, straighten the wine spout and pour again. Step 4: A bottleneck of approximately 18mm-20mm is required for use. To blow the air out, the data is usually a little off on the first test and will start to be accurate in the on the second or third test. Material: plasticandmetal colour: transparent Package Contents: 10 x quantitative wine pourer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.