ASTM Perforated Plate Test Trays are used in Gilson Testing Screen and Test-Master® screen shakers. These special screen trays are used for the testing of coal, ores, wood chips, and other special materials. Trays are fitted with punched openings in steel plates and meet ASTM D4749 and E323 test standards. The precision punched round openings range from 1/8 to 4in (3.18 to 100mm).
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