Conn-Selmer Flute Care Kit. Selmer Instrument Care Kits are the most complete kits on the market. Selmer quality components make the kits a practical choice for beginners and professionals as well. Smart teachers and musicians will recognize the value of the Selmer Instrument Care Kits because the kit is less than the total cost of its components. In reusable plastic pouch. Kit contains: Cleaning brush/duster, two cleaning cloths, key oil and polishing cloth.