Flexible Inserted Either From Mouth or Nose Ensures Positive Pressure Ventilation During Surgeries Clear PVC Material for Easy Viewing of Moisture Condensation Smooth-Formed Murphy Eye as Vent Avoiding Airway Obstruction Soft-Seal Cuff to Prevent Aspiration Black Intubation Depth Marker for Proper Positioning . The Portex Oral/Nasal Endotracheal Tube is a reliable device used to provide ample oxygen and inhaled gases to a patient's lungs. This medical tool is inserted into the patient, and is placed between the vocal cords through the trachea, ensuring a positive pressure ventilation during surgeries. It is sold 20 pieces per box. DURABLE: This Portex Endotracheal Tube is made from heavy-duty clear PVC material with a standard connector, ensuring a clear view of the moisture condensation from the patient's breath. DEPENDABLE: It comes with a Soft-Seal Cuff, which is made from soft PVC material to minimize risk of trauma, providing an effective seal to prevent aspiration. VERSATILE: It can be inserted either into the mouth or into the nose of the patient, depending on the needs of the procedure. EFFICIENT: This Endotracheal Tube has a smoothly-formed Murphy eye that works as a vent, designed to avoid vocal cord damage during intubation, and helps in preventing the complete obstruction of the airway. ACCURATE: A black intubation depth marker is designed to accurately position the trachea tube tip with the trachea.