Central Venous Catheter kits have one to four separate lumens that are sized to perform their individual functions. The catheters are radiopaque to help confirm catheter tip location in the patient by chest X-ray. Polyurethane(PU), is high degree of biocompatibility, makes up the body of the catheters. To reduce the chance for vessel trauma, and have a special soft-tip which is more pliant than the rest of the catheter.