structural:reformatting, structural:summarization
19th-century construction

Sattler had a great influence on trombone design, introducing a significantly larger bore (the most important innovation since the Renaissance), Schlangenverzierungen (snake decorations), the bell garland, and the wide bell flare. These features were widely copied during the 19th century and are still found on German made trombones.

The trombone was improved in the 19th century with the addition of "stockings" at the end of the inner slide to reduce friction, the development of the water key to expel condensation from the horn, and the occasional addition of a valve that was designed to be set in a single position but later became the modern F-valve. The valve trombone appeared around the 1850s shortly after the invention of valves, and was in common use in Italy and Austria in the second half of the century.