00CS-425 : 425 microns or No.40
Calibration Standard for 200mm (8") Diameter Sieves, NIST Traceable for 425μm (No.40); also suitable for 400μm and 450μm; 5 bottle set, 2.5g per bottle
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Calibration Standard for 200mm (8") Diameter Sieves, Aperture Size 425μm (No.40). Also suitable for 400μm and 450μm sieves. Set of 5 bottles, 2.5g per bottle. Mean aperture sizes traceable to NIST. Single-shot bottles remove operator bias.