The Officemate Grande Central Filing System is perfect for centralized office mail or filing system or for individual office or cubicle use. All 7 file pockets feature an envelope/postcard 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. Compact detachable pencil cup fits on either side of the starter pocket and holds pens and pencils. Easy to assemble. Mount to walls easily with included mounting hardware. Plastic. Black. Can be hung on cubicle with hangers (not included). Simply snap on Add-on Pocket (21722) to expand.