The E-Z Sort Sorter Module is a mail organizer featuring 20 molded compartment mail shelves, each with finger cutout and label holder, that can be used to sort, store and organize documents and files. The 11 mail shelves form a combination of up to 25 shelves. The mail sorter can stand alone or stack and is built of a durable heavy-gauge steel. The extra-wide mail organizer features a black powder-coated finish for durability. Additional mail shelves available.