Currently, there have been many research studies into polyurethane ureteral stents, but there is little data that supports the use of silicone stents. We will focus on testing the mechanical properties of commercially available silicone stents pre and post exposure to human urine, which include their tensile and compressive strengths and frictional force/coil strength, because these properties may affect stent performance and patient comfort. We will also study  the encrustation rates of the silicone stents when they are exposed to urine for different durations of indwelling, 10 and 30 days respectively. Silicone stents are currently available to the public. However, there is skepticism among doctors about using these silicone stents versus polyurethane. Our project focuses on collecting quantitative data comparing polyurethane and silicone to see if there is substantial data supporting silicone being the new gold standard.