Al Cass Fast Valve, Slide and Key Oil is a multi-purpose, odourless lubricant. Perfectly designed to lubricate valves, slides, or keys, this oil does not gum or separate. Regardless of weather conditions, this oil maintains form and can be relied upon when travelling to and from rehearsals and performances. Al Cass Fast Valve, Slide and Key Oil comes in a 2-oz. bottle.