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The test sieves are ideal for use in industries that involve chemicals, food preparation, or fine pharmaceutical powders. Manufactured from brass or stainless steel, the separating meshes come in different aperture measurements to suit specific materials. The bottom perforations are available in different shapes to properly strain mixture components. These astm test sieves meet ASTM E11 and AASHTO requirements for Compliance Test Sieves, and are serial numbered and supplied with certificates of manufacturing conformance. Each sieve is serialized and supplied with a certificate of quality assurance for consumer satisfaction.