The Graham Field-2299 is a reliable diagnostic tool designed to help patients and clinicians collect kidney stones for laboratory evaluation. Each strainer features a durable white polypropylene frame and a fine nylon mesh screen with a density of 60 squares per square inch. This optimal mesh size ensures that even the smallest fragments are captured while allowing urine to flow through without obstruction. The design includes a built-in tab for sanitary handling and is sized to fit conveniently into standard 24-hour specimen collection containers. While designated for single patient use, the plastic material is rinsable, allowing a single patient to use the same strainer for multiple days during a stone passage event.