ICU Medical-100/125/010 Portex® Tracheal Tube Guide, Single-Use, 4.0-6.0mm ID, 10CH/3.3mm Size, 27.55" Length, 10/bx (US Only)ICU Medical Portex Tracheal Tube Guide (100 125 010) is a single use device designed to facilitate safe and accurate tracheal intubation. Compatible with tracheal tubes ranging from 4. 06. 0mm ID, it features a 10CH 3. 3mm size and 27. 55 inch length to provide precise guidance during airway management. Its smooth construction ensures minimal trauma to airway tissues, supporting efficient and controlled intubation in clinical and emergency settings.