Frames of seamless spun brass with rolled edges and stainless steel mesh. Extended bottoms fit all frames, pans or separator bottoms of the same diameter so a set of sieves can be stacked. USA Standard Sieves are available in both full and half height, 8" diameter. All sieves meet ASTM E11, AASHTO M92, ANS Z23.1, RR-S-366d standards. 3-, 5-, 6-, 10-, and 12-inch diameters are also available; contact Krackeler Scientific for more information.