TRACHEOSTOMY TUBES with 1 inner cannula (with speaking option)

TRACHEOSTOMY TUBES with 1 inner cannula (with speaking option)
Sieved outer cannula
1 fenestrated inner cannula with detachable silver speaking valve enables phonation (secured against falling off by a small silver chain)
Conical form facilitates insertion
Large inner lumen
Long duration of use due to high durability of silver material
Including neck strap