Mailroom sorter features large 11 5/8w x 13 1/4d x 2 5/8h compartments that easily accommodate mail volume. Compartment "thumb cuts" speed mail retrieval. Rugged steel construction stands up to the wear and tear of a busy mailroom. Literature Sorter Type: Open Front Mail Number of Compartments: 20 Compartment Size: 13 1/4" x 2 5/8" x 11 5/8".MLNSR2446RPG. SR2446RPG. Mayline Mayline Kwik-File Mailflow-To-Go 2 Tier Corner Sorter w/Riser.