Denis Wick is pleased to set a new standard in brass instrument lubrication with innovative new product. Developed in association with trumpet expert Will Spencer, Denis Wick Advanced Formula Valve Oil is already acclaimed as a favorite by many leading brass players. It gives modern valves a very silky feel, is exceptionally long-lasting and remains unaffected by extreme weather conditions, so no more problems of slow, sticky valves in hot weather due to evaporation.