Perfect for centralized office mail or filing system or for individual office or cubicle use. Seven file pockets all have envelope and post card slot and space for pocket labels. Special slots for #10 envelopes or postcards allow easy retrieval. Unique design accommodates letter/A4 size documents and files. Slender, detachable pencil cup fits on either side of the starter pocket and holds writing utensils. Easy to assemble. Mount to walls easily with included mounting hardware. Can be hung on cubicle with hangers(not included). Simply snap on Add-On pocket(OIC21722) to expand the Filing System. Made in USA.