The AlphaSynth valve and rotor oil offers a great balance between odourless high quality synthetic lubricants and a synthetic solvent - all blended to a light viscosity. This combination cleans the valve (or rotor) during use whilst also providing a light layer of lubrication to smooth the action. This Superslick AlphaSynth oil will not stain and has a high resistance to oxidation. It is also completely safe for classroom use. We have found this oil to give excellent results on a variety of brass instruments. Odourless high-quality synthetic lubricant Classroom safe and will not stain 60ml bottle size with screw top and safe applicator Made in Elkhart, Indiana, USA