Medical instruments and apparatus, including medical guide wires, PTCA (Percutaneous Transluminal Coronary Angioplasty) guide wires, IVR (Interventional Radiology) guide wires, spring guide wires, and plastic clad guide wires; angiographic guide wires; catheters including PTCA guiding catheters, PTCA balloon catheters, angiographic catheters, micro catheters, and occlusion catheters; polypectomy snares; retrieval baskets; endoscopic cleaning brushes