Section 15 Base metals and articles of base metal 72 Iron and steel 72 28 Other bars and rods; angles, shapes and sections of other alloy steel 72 28 80 Hollow drill bars and rods, of alloy or non-alloy steel Commodity Code Description 72 28 80 00 Hollow drill bars and rods, of alloy or non-alloy steel 72 28 80 11 Of circular cross-section 72 28 80 19 Other 72 28 80 90 Other
