Fellowes Plastic Partition Additions Shelf, 4 3/4 Inch x 17 3/4 Surface Area, Graphite (7528101) Partition Additions graphite plastic shelf features partition-mounting stainless steel points. 18 1/8w x 5 3/8d. Contemporary style plastic shelf fastens securely to any "tackable" partition to help customize and maximize your workspace. Easily repositioned utilizing stainless steel points. Add surface space in your cubicle for display or storage of office accessories, small manuals and more. Surface area is 4 3/4 x 17 3/4.