| Standard International Trade Classification (SITC) - level 1 - Section | 6 | Manufactured goods classified chiefly by material | 
                
                  
                    | Standard International Trade Classification (SITC) - level 3 - Group | 681 | Silver, platinum and other metals of platinum group | 
                
                  
                    | Standard International Trade Classification (SITC) - level 3 - Group | 682 | Copper | 
                
                  
                    | Standard International Trade Classification (SITC) - level 3 - Group | 683 | Nickel | 
                
                  
                    | Standard International Trade Classification (SITC) - level 3 - Group | 684 | Aluminium | 
                
                  
                    | Standard International Trade Classification (SITC) - level 3 - Group | 685 | Lead | 
                
                  
                    | Standard International Trade Classification (SITC) - level 3 - Group | 686 | Zinc | 
                
                  
                    | Standard International Trade Classification (SITC) - level 3 - Group | 687 | Tin | 
                
                  
                    | Standard International Trade Classification (SITC) - level 3 - Group | 689 | Misacellaneous non-ferrous base metals for metallurgy |