Wall filing system mounts easily and securely to any flat vertical surface. Expansion of this modular file is as simple as attaching the desired number of add-on pockets to each basic pocket. Includes all necessary hardware and mounting materials. Space required: 16" wide x 29-1/4" high. Contains one basic pocket and six add-on pockets. Makes seven compartments. Includes Deluxe Hot File Labeling System to add functionality. One easy-to-apply label holder packet included with each pocket. Accommodates material up to 15-11/16".