Tennsco Literature Sorters come in letter or legal size. They offer the ultimate in organization and access to company materials, internal documents, forms and paper supplies. They???re also great for sorting and distributing incoming mail such as magazines, envelopes, etc. Literature Sorters may be used individually or stacked on top of each other to meet your specific requirements. They are constructed entirely of steel, assuring an outstanding value and years of use. Each comes standard with 21 openings, are adjustable on 1 1/2' centers, and can be arranged to fit specific applications without tools. Optional Extra Trays (Pack of 5).