| 7304.31.00 | | Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel. - Other, of circular cross-section, of iron or non-alloy steel: - Cold-drawn or cold-rolled (cold-reduced) | KGM | Free | CCCT, LDCT |
| 7304.31.00 | 10 | Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel. - Other, of circular cross-section, of iron or non-alloy steel: - Cold-drawn or cold-rolled (cold-reduced) - Mechanical tubes and pipes | KGM | | |
| 7304.31.00 | 21 | Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel. - Other, of circular cross-section, of iron or non-alloy steel: - Cold-drawn or cold-rolled (cold-reduced) - Pressure tubes and pipes: - For power boilers | KGM | | |
| 7304.31.00 | 28 | Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel. - Other, of circular cross-section, of iron or non-alloy steel: - Cold-drawn or cold-rolled (cold-reduced) - Pressure tubes and pipes: - For other boilers | KGM | | |
| 7304.31.00 | 29 | Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel. - Other, of circular cross-section, of iron or non-alloy steel: - Cold-drawn or cold-rolled (cold-reduced) - Pressure tubes and pipes: - Other | KGM | | |
| 7304.31.00 | 90 | Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel. - Other, of circular cross-section, of iron or non-alloy steel: - Cold-drawn or cold-rolled (cold-reduced) - Other | KGM | | |
Harmonized Tariff Schedule of the Canada inquiry: aircraft+parts
