Section 15 Base metals and articles of base metal 83 Miscellaneous articles of base metal 83 05 Fittings for loose-leaf binders or files, letter clips, letter corners, paper clips, Commodity Code Description 83 05 10 Fittings for loose-leaf binders or files of base metal 83 05 20 Staples in strips, of base metal 83 05 90 Office articles such as letter clips, letter corners... of base metal