Trombone Mouthpiece Cleaning Brush - Mouthpiece Cleaner for Better Tone Production & Polish Cloth Pack Package includes Brass Mouthpiece Cleaning Brush & Polish Cloth. Brass Mouthpiece Cleaning Brush - This powerful cleaning tool helps remove dirt & grime build-up inside your mouthpiece, which is unsightly and detrimental. The tapered shape of this stiff bristled nylon mouthpiece cleaning brush enables thorough cleaning, and will help you maintain an unobstructed airflow making for better tone production. This tool is an essential accessory for all Brass Players. Instrument Polishing Cloth: Take proper care of your musical instrument with this high buff cleaning/polish cloth.