The Superslick AlphaSynth trombone handslide lube contains an incredibly unique synthetic formula designed to be used sparingly. The high-quality base synthetic components and long-lasting formula of the handslide lube provides outstanding lubrication to keep your trombone handslide in proper playing condition. Renew the performance of the AlphaSynth Handslide Lube with a spritz of water (distilled water recommended). This AlphaSynth Handslide Lube is USA made and is completely safe for classroom use, making it a favorite of music teachers, repair shop technicians and players alike.