Overfile is designed to fasten onto lateral file cabinets to store binders, manuals and other items, Design includes two shelves, four wire dividers per shelf, a core removable lock and fastening hardware, One shelf is adjustable at 1"" increments up to 6"" from center position, Overfile is certified by SCS to be in compliance with specific indoor air quality emission requirements, Meets or exceeds applicable ANSI/BIFMA standards, SKU: SPRCH29571