| 7306.29.10 | 90 | Other | kg |  |  |  | 
| 7306.29.20 | 00 | Other | kg | Free |  | 1% | 
| 7306.29.31 | 00 | Other: |  |  |  |  | 
| 7306.29.31 | 00 | Threaded or coupled | kg | Free |  | 28% | 
| 7306.29.41 | 00 | Other | kg | Free |  | 8.5% | 
| 7306.29.60 |  | Tubing: |  |  |  |  | 
| 7306.29.60 |  | Of iron or nonalloy steel |  | Free |  | 5.5% | 
| 7306.29.60 | 10 | Imported with coupling | kg |  |  |  | 
| 7306.29.60 | 50 | Other | kg |  |  |  | 
| 7306.29.81 |  | Other |  | Free |  | 10% | 
| 7306.29.81 | 10 | Imported with coupling | kg |  |  |  | 
| 7306.29.81 | 50 | Other | kg |  |  |  | 
| 7306.30 |  | Other, welded, of circular cross section, of iron or nonalloy steel: |  |  |  |  | 
| 7306.30.10 | 00 | Having a wall thickness of less than 1.65 mm | kg | Free |  | 25% | 
| 7306.30.30 | 00 | Having a wall thickness of 1.65 mm or more: |  |  |  |  | 
| 7306.30.30 | 00 | Tapered steel pipes and tubes principally used as parts of illuminating articles | kg | Free |  | 45% | 
| 7306.30.50 |  | Other |  | Free |  | 5.5% | 
| 7306.30.50 | 10 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold drawn | kg |  |  |  | 
| 7306.30.50 | 15 | Other, cold-drawn | kg |  |  |  | 
| 7306.30.50 | 20 | Other, cold-rolled (cold-reduced) with a wall thickness not exceeding 2.54 mm | kg |  |  |  | 
| 7306.30.50 | 25 | Other: |  |  |  |  | 
| 7306.30.50 | 25 | With an outside diameter not exceeding 114.3 mm: |  |  |  |  | 
| 7306.30.50 | 25 | Galvanized: |  |  |  |  | 
| 7306.30.50 | 25 | Imported with coupling | kg |  |  |  | 
| 7306.30.50 | 28 | Internally coated or lined with a non-electrically insulating material, suitable for use as electrical conduit | kg |  |  |  |