ASC Scientific has everything you need to conduct grain size analysis. We sell U.S. Standard and Metric (B.S.) Standard wire mesh testing sieves, as well as sieve pans and lids from popular manufacturer W.S. Tyler. Sieves come in 3”, 6″, 8”, 10″, 12″, 18″ & 200mm diameters, all available in a varying range of U.S. Standard opening sizes and material types. Every W.S. Tyler sieve sold by ASC Scientific comes with a certificate of compliance stating their adherence ATSM E-11, ISO 3310-1, and BS 410 specifications. Sieve certification (calibration) is available at additional cost. Sieve shakers and accessories are available here.