12" diameter, 4.25" high. Depth to cloth 3.25". Stainless steel wire cloth with brass frame. Each sieve has an individual serial number. The sieves are manufactured with sieve cloth that has been examined on equipment that is traceable to N.I.S.T. and found to be within stated tolerances.

These sieves are made in accordance with National Bureau of Standards Letter Circular specifications, LC584, ASTM E11, ASA Z23.1, AASHO No. M92. Meet U.S. Federal Specifications RR-S-366b. Sieves are marked with Sieve Number, the opening in mm and the opening in inches. Each sieve comes with a Certificate of Conformance.

(*) These standard designations correspond to the values for test apertures recommended by the International Standards Organization, Geneva, Switzerland.