CLASSIFICATION IS DETERMINED BY THE PROVISIONS OF GIR 1 TERMS OF HEADING 7304 SEAMLESS TUBES AND PIPES AND HOLLOW PROFILES OF STEEL AND GIR 6 SUB HEADING 730431 CIRCULAR CROSS SECTION COLD DRAWN COLD REDUCED. CN CODE 73043120 PRECISION TUBE. TARIC CODE 7304312090 NOT FOR USE IN CIVIL AIRCRAFT.