U.S. Standard, full height, brass frames. 8" diameter, 2" depth to wire cloth. Brass cloth is used in No. 18 and coarser; phosphor bronze cloth in No. 20 and finer. Each sieve is supplied with an engraved serial number and a test certificate for complete traceability. Sieves with 1" depth are also available upon request. ASTM E-11, AASHO T-27 and conforming to NBS Standards.