Herco Spitballs, large, the amazing cleaning discs for brass instruments. Specially treated moist foam. 'Spitballs' are blown through the horn to give instantaneous cleaning. Spitballs for large bore Tenor Trombones and Baritone Horns. Packaged 15 Spitballs per jar.
This is an OK product. It will NOT replace your regular need of cleaning for the trombone, but it helps keeping the slide clean for a longer period of time. One bad thing is that they do not last long.