The Superslick AlphaSynth light viscosity valve and rotor oil contains an incredibly unique synthetic formula designed to be used with piston and rotary valves with regular or tight tolerances. The high-quality base synthetic components and long-lasting formula of this oil provides outstanding lubrication to keep your instrument in proper playing condition. This amazing synthetic oil cleans the valve or rotor while it lubricates, without staining and resisting oxidation. This AlphaSynth light viscosity oil is in a convenient refill size and USA made. Completely safe for classroom use, the AlphaSynth oil is a favorite of music teachers, repair shop technicians and players alike.