This Literature and Mailing System with Letter Depth pockets is a complete mail center system with 504 adjustable pockets, back to back sorters, and lower storage shelves on each table. This C-Shaped system also includes a dump table and two open desks for easy sorting of large amounts of mail. Each pocket is 11-1/2" wide and 12-1/4" deep. Every pocket height is adjustable in 1/2" increments.