Characteristics: the use of polyurethane materials, soft, highly flexible multi-lateral hole, flow, and not easily deformed stent smooth, easy to pass through the ureter biocompatibility, and the organization no harm, no stimulation, not to completely plug the X-ray imaging, easy to check Model: double-tail, single-tail catheter outer diameter sub-4F, 4F,5F, 6F, 7F, 8F Components: stent ...