The micro catheter is intended use for the infusion of contrast media, medicine or embolic material into coronary vasculatures, also intended for providing support to the placement of guide wires or guide wire exchange characteristics： 1、Excellent radiopaque, closed-loop platinum/iridum marker band embeded for smooth transition 2、PTFE inner layer designed to provide superb pushability when supporting for device advancement 3、Higher density stainless steel braid structure throughout the cathe