| 7304.29.10 | 30 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.10 | 40 | Having a wall thickness of 12.7 mm or more | kg | | | |
| 7304.29.10 | 50 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.10 | 60 | Having a wall thickness of 12.7 mm or more | kg | | | |
| 7304.29.20 | 10 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.20 | 20 | Having a wall thickness of 12.7 mm or more | kg | | | |
| 7304.29.20 | 30 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.20 | 40 | Having a wall thickness of 12.7 mm or more | kg | | | |
| 7304.29.20 | 50 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.20 | 60 | Having a wall thickness of 12.7 mm or more | kg | | | |
| 7304.29.31 | 10 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.31 | 20 | Having a wall thickness of 12.7 mm or more | kg | | | |
| 7304.29.31 | 30 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.31 | 40 | Having a wall thickness of 12.7 mm or more | kg | | | |
| 7304.29.31 | 50 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.31 | 60 | Having a wall thickness of 12.7 mm or more | kg | | | |
| 7304.29.41 | 10 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.41 | 20 | Having a wall thickness of 12.7 mm or more | kg | | | |
| 7304.29.41 | 30 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.41 | 40 | Having a wall thickness of 12.7 mm or more | kg | | | |
| 7304.29.41 | 50 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.41 | 60 | Having a wall thickness of 12.7 mm or more | kg | | | |
| 7304.39.00 | 28 | Having a wall thickness of 6.4 mm or more but not exceeding 12.7 mm | kg | | | |
| 7304.39.00 | 32 | Having a wall thickness exceeding 12.7 mm | kg | | | |
| 7304.39.00 | 36 | Having a wall thickness less than 12.7 mm | kg | | | |
Harmonized Tariff Schedule of the United States inquiry: 3203Ã
