Portex Non-Cuffed Endotracheal Tubes. Manufactured from implantation tested non toxic Siliconised PVC, which helps to protect the delicate mucosal tissue. Provides a direct and unimpeded airway for gases to pass to and from the lungs. Kink resistant minimises the possibility of tube occlusion. 15mm connector conforming to ISO5356-1 ensuring full compatibility with circuit connections. Available in 2.0mm to 4.5mm.