Calculi Strainer McKesson Mesh Screen, Built-in Tab, White Plastic, Disposable All 24 Hour Specimen Collectors Mesh screen is 60 square per square inch, which is the optimal size for filtering the smallest stones while allowing unobstructed flow-through Built-in tab for easier handling and sanitary conditions Durable white plastic construction Rinsible plastic allows one patient to use strainer for several days Fits conveniently into 24-hour specimen collection containers Single patient use Disposable