Section 15 BASE METALS AND ARTICLES OF BASE METAL 76 Aluminium and articles thereof 76 16 Other articles of aluminium. 76 16 99 Gutters with or without fittings; roof capping and skylight frames 76 16 99 30 Gutters with or without fittings; roof capping and skylight frames Commodity Code Description 76 16 99 30 00 Gutters with or without fittings; roof capping and skylight frames