Alisyn Valve Slide Key Oil is a premium synthetic oil that offers performance advantages to professional musicians, repair shops and serious amateurs that are simply not available with any other products. The oil is clean and clear and is stain resistant.It offers exceptional rust, friction, anti-wear protection. The oil remains on valve and slide surfaces, does not accumulate in the valve caps. The action on brass and woodwind instruments is smooth and quick. The oil remains serviceable at temperature ranges from -80 degrees F to 400 degrees F (instruments are sometimes subjected to temperature extremes during transport). Although the initial cost of Alisyn Instrument Lubricants is higher, our oils perform better and last many times longer than other conventional products. Give your cherished instrument the care it deserves.