| Classification of Products (CZ-CPA_2025) - level 4 - Class | 
                    2420 | 
                    Tubes, pipes, hollow profiles and related fittings, of iron or steel | 
                  
                
                  
                    | Classification of Products (CZ-CPA_2025) - level 6 - Sub-category | 
                    242031 | 
                    Line pipe of a kind used for oil or gas pipelines, welded, of an external diameter of <= 406,4 mm, of iron or steel | 
                  
                
                  
                    | Classification of Products (CZ-CPA_2025) - level 6 - Sub-category | 
                    242032 | 
                    Casing and tubing, of a kind used in drilling for oil or gas, welded, of an external diameter of <= 406,4 mm, of iron or steel | 
                  
                
                  
                    | Classification of Products (CZ-CPA_2025) - level 6 - Sub-category | 
                    242033 | 
                    Other tubes and pipes, of circular cross section, welded, of an external diameter of <= 406,4 mm, of iron or steel | 
                  
                
                  
                    | Classification of Products (CZ-CPA_2025) - level 6 - Sub-category | 
                    242034 | 
                    Tubes and pipes and hollow profiles, welded, of non-circular cross-section, of iron or steel | 
                  
                
                  
                    | Classification of Products (CZ-CPA_2025) - level 6 - Sub-category | 
                    242035 | 
                    Other tubes, pipes and hollow profiles, such as open seam, riveted or similarly closed, and of iron or steel |