Gold Plated for smaller Brasswinds, Trumpet Cornet, Flugle, Tenor, Alto, Piccolo Trumpet, etc. The Pollard Water Key is the answer to those worrisome Amado Water Keys, and a superior alternative to the Saturn, Joy, Cork lever and spring, and others on the market. The geometry makes it simply the best concept for reliablity, and no-worry performance. Demand the BEST on your horn!