Section 15 BASE METALS AND ARTICLES OF BASE METAL 73 ARTICLES OF IRON OR STEEL 73 04 TUBES, PIPES AND HOLLOW PROFILES, SEAMLESS, OF IRON (OTHER THAN CAST IRON) 73 04 90 OTHER TUBES/PIPES/HOLLOW PROFILES, SEAMLESS, OF IRON(NOT CAST IRON)/STEEL Commodity Code Description 73 04 90 00 OTHER TUBES/PIPES/HOLLOW PROFILES, SEAMLESS, OF IRON(NOT CAST IRON)/STEEL