Reliable materials: the automatic measure liquor pourers are made of plastic, which is a durable material and will not corrode and rust easily, the small balls inside are made of 304 stainless steel, safe and sturdy; Pourer covers are made of poly plastic, translucent and flexible, easy to cleanWide applications: suitable for most bottles and can be fitted on most liquor bottles, at the same time, can be applied with juice, syrups, and oils; Note: inaccurate pourers will occur when they work with waterPractical to use: with the standard capacity of 1 oz/ 30 ml, the pourer features a clear spout that will reduce wear and tear, and a tail can help to easily distinguish it from liquor pourers of different sizes, the automatic measure liquor pourers are easy to install and remove, convenient to useReduce waste: the automatic measure liquor pourers provide a nice way to reduce over pouring and spills and to maintain cleanliness, which can help you save two to four drops per bottle and save you much time in cleaningPackage included: you will get 4 pieces of automatic measure liquor pourers, each measure liquor pourers with two ball bearings for a controlled, smooth and accurate pour, nice tools for your daily use Automatic Measured Bottle Pourer, Spout Bottle Pourer with Tail and Collar, Liquor Bottle Pourers Bottle Jigger Quick Shot Spirit Measure Pourer, 1 oz/ 30 ml (Black and Transparent, 4)