Guidewires are intended to provide access and facilitate passage of endourological instrumentation during urological procedures in patients as determined by physicians. The NiCore™ Nitinol Guidewire consists of a kink resistant, nickle-titanium (Nitinol) wire that is jacketed with a thermoplastic polymer. The outermost surface of the guidewire is indicated to provide transurethral and/or percutaneous access into the bladder, ureter and renal pelvis. The NiCore™ Nitinol Guidewire is offered in many different configurations that include sizes (lengths and diameters), tip designs and stiffness.