A sand equivalency test set and refills of shock solution are available in this category.  This set is used to indicate the relative proportion of clay like or plastic fines and dust in fine aggregates or soil.

Sand Equivalency
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Colonial Scientific has teamed up with the industry leaders, Fisher Scientific and VWR, and now offers their entire product line. Colonial Scientific provides any part from the Fisher Scientific site with a part number.
Fisher ScientificVWR Catalog Grainger
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