General anesthesia surgery, critically ill patients with cardiac arrest and respiratory patients rescue and non-surgical patients requiring endotracheal intubation treatment. Made from medical grade PVC SIze3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0 For single use only Reliable and comfortable product Minimum puncture with less pain /smooth injection/precise needle length International quality of excellence First-class material from worldwide wuppliers /stringent quality control/distinct product traceability Full support to partners Affordable excrllence with long term profit/quick reponse /on-time delivery