Bivona Adult TTS Silicone Tracheostomy Tube. The inflated cuff creates a seal between the tube and the trachea, protecting against aspiration and optimizing respiration. When the cuff is deflated, it rests tight to the shaft of the tube. Recommended for patients with sensitive tracheal mucosa or stoma site, when the patient needs to ability to speak, intermittent or nocturnal ventilation patients and patients ready for weaning. ID: 7.5mm, OD: 10.5mm, L: 80.0mm.