ASTM E11 Compliance Grade Screen Trays for Gilson Testing Screen and Test-Master®are offered in sizes from 5in to No.400 (125.0mm to 38µm). Cloth material is stainless steel. Clear Screen area is 14.75x22.75in (375x578mm). Total dimensions with frame are 17.75x26.25x2.625in (451x667x67mm), WxDxH. Screen Trays are serial numbered and supplied with certificates of manufacturing conformance. The most popular sizes are in stock. Additional sizes are available not listed. Contact us if you need one of those sizes.