Not only are the mesh counts and openings accurate, but there are no crevices or other "catch all" traps to retain particles and give false analyses. Newark sieves will take care of most sizing, testing, and grading requirements. Openings cover a wide range. By using one or more pans with extended rims, you can make up any combination of sieves to provide multiple screen analyses simultaneously. Meet ASTM, NBS, ASA specs, and ISO recommendations. All sieves are carefully inspected prior to shipment and individually boxed for your convenience. All sieves are 2" H x 8" diameter.