It is a swab can be used leadpipes, trumpet, Cornet, Flugel Horn, differential tube, and differential tube Horn, althorn, mellophone, baritone. (Not available in no. 3 differential tube Horn and mellophone).
Using Microfiber materials independently developed by Yamaha for brass swabs. Absorbency is high, of course, very flexible material for the corner wipe is possible.
* May not used by manufacturers or musical instruments.