The UltraQuiet™ Mary Ann SifterThe durable UltraQuiet Mary Ann Laboratory Sifter continues to be the industry standard for accurately sifting aggregates into proper particle sizes. The new generation Mary Ann units are UltraQuiet, with wheels for easy relocation and a SieveRack under the unit for easy storage of sieves. Inside a handmade enclosure 8 or 12 sieves can be stacked up to 26 in height and placed inside the Mary Ann without clamping. The Mary Ann features wood hammers