Made from non-toxic, non-irritant, medical grade clear PVC. Kink resistant, thin-walled, thermo-sensitive tube, softens at body temp. Anatomically designed tube and obturator with extra smooth and curved distal end for atraumatic intubation and extubation. E.T.O sterile and pyrogen free. Sizes : 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0mm.