Catheters and catheter kits; catheter introducers; catheter insertion trays; vascular access ports for medical use; tunnelers, namely peripheral vascular tunnelers, vascular graft tunnelers; dialysis accessories, namely introducer sheaths, dilators, hemostatis valves, safety needles, hypodermic needles, syringes, namely hypodermic, information devices, namely rings and other annular structures, adapted to fit around medical tubing, having alphanumeric, color-coding or other information media on the exterior surface, extension tubes, luers, medical guide wires, medical guide wire introducers, medical guide wire advancers, hubs, cuffs; tubing clamps and clips, adapters, luer cleaners, introducer sheaths and dilators; caps; all for medical or surgical purposes