Made from non-toxic, medical grade clear silicone/PVC. Softens at body temp. Smooth inside/outside surface for ease in intubation, extubation and suctioning. Radio opaque line, markings provided to facilitate identification of tube position. E.T.O Sterile with cuffed and non-cuffed. Sizes 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10mm.