The Instrument Silver Key Polishing Cloth is made of high-quality microfiber fabric, lightly coated in a non-toxic polishing agent that can help shine & buff your silver oboe keys to look like new!

The cloth is about 8 x 8 cm square. The black coloration on the cloth as you use it is normal as it gets rid of the tarnish on your silver keys. Please discard after multiple uses. Do not wash.