Section 15 BASE METALS AND ARTICLES OF BASE METAL 74 COPPER AND ARTICLES THEREOF 74 09 COPPER PLATES, SHEETS AND STRIP, OF A THICKNESS EXCEEDING 0.15 MM. 74 09 31 PLATES,SHEET AND STRIP > 0.15MM OF COPPER-TIN BASED ALLOYS(BRONZE)IN COILS Commodity Code Description 74 09 31 00 PLATES,SHEET AND STRIP > 0.15MM OF COPPER-TIN BASED ALLOYS(BRONZE)IN COILS