OPTIMA Replacement inner cannulas Replacement inner cannulas This inner cannula is unfenestrated and transparent for improved secretion assessment. The red inner cannula is fenestrated and enables phonation in conjunction with a speaking valve. The white inner cannula is unfenestrated and made of radiopaque material for position control. Open product list×product listOPTIONAL ACCESSORIES Jens Fritzsche2020-12-12T16:37:45+02:00