... 1.Non-toxic, medical grade PVC material; 2.size:2.5-8.5 3. endotracheal tube,reinforced endotracheal tube Description : ... with visible markings for easy observation..5.size:2.5,3.0,3.5,4.0,4.5,5.0,5.5,6.0,6.5 ... ,7.0,7.5, ... 8.0,8.5 ... ,9.0,9.5good packing and endotracheal tube with ...