Central Venous Catheter Kit, Standard, Double lumen 7Fr*15cm 1.The main tube is made of biocompatible Polyurethane,tested for toxicity and hemocompatability,and become softer at body temperature and can be shaped according to the blood vessel. 2.The tube's surface is smooth, can protect the blood vessel wall, effectively prevent thrombosis and reduce the catheter resistance; 3.With graduation, to facilitate the clinical needs of the length of catheter; 4.Radiopacity facilitates confirmation of catheter placement; 5.Reasonable structure and stable flow.