Harmonized System
Section XV > Chapter 73 > Heading 7306 > 7306.40
Other, welded, of circular cross-section, of stainless steel
Section XV > Chapter 73 > Heading 7306 > 7306.50
Other, welded, of circular cross-section, of other alloy steel
Section XV > Chapter 73 > Heading 7306 > 7306.6 > 7306.61
Of square or rectangular cross-section
Section XV > Chapter 73 > Heading 7306 > 7306.6 > 7306.69
Of other non-circular cross-section
Section XV > Chapter 73 > Heading 7307
Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel.
Section XV > Chapter 73 > Heading 7307 > 7307.1
Cast fittings
Section XV > Chapter 73 > Heading 7307 > 7307.2
Other, of stainless steel
Section XV > Chapter 73 > Heading 7307 > 7307.1 > 7307.11
Of non-malleable cast iron