Four swivel casters give this handy bin/file high mobility. Four 7¾" × 7¾" (20 cm × 20 cm) storage bins make this the ideal organizer for rolled maps, plans, or drawings. It's constructed of plastic-coated, heavy-gauge wire and has dimensions of 16¼" × 16¾" × 28" (41 cm × 43 cm × 71 cm). This bin/file is shipped unassembled with illustrated instructions.