Sterisol Premixed Germicide perfect for keeping unwanted germs away from your wind music instruments. With Sterisol your brass instrument, mouthpiece, or woodwind reed will be completely germ-free and safe for use! Affectionately known as "The Red Stuff," Sterisol has been a staple in thousands of classrooms and studios for decades, giving positive sanitizing action in one minute. 8 oz. bottle. Important: For use on headjoint or mouthpiece only.