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7304.29.2060Having a wall thickness of 12.7 mm or morekg
7304.29.31Of other alloy steel:
7304.29.31Threaded or coupledFree28%
7304.29.3110Having an outside diameter less than 215.9 mm:
7304.29.3110Having a wall thickness less than 12.7 mmkg
7304.29.3120Having a wall thickness of 12.7 mm or morekg
7304.29.3130Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.29.3130Having a wall thickness less than 12.7 mmkg
7304.29.3140Having a wall thickness of 12.7 mm or morekg
7304.29.3150Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.29.3150Having a wall thickness less than 12.7 mmkg
7304.29.3160Having a wall thickness of 12.7 mm or morekg
7304.29.3180Having an outside diameter exceeding 406.4 mmkg
7304.29.4110Having an outside diameter less than 215.9 mm:
7304.29.4110Having a wall thickness less than 12.7 mmkg
7304.29.4120Having a wall thickness of 12.7 mm or morekg
7304.29.4130Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.29.4130Having a wall thickness less than 12.7 mmkg
7304.29.4140Having a wall thickness of 12.7 mm or morekg
7304.29.4150Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.29.4150Having a wall thickness less than 12.7 mmkg
7304.29.4160Having a wall thickness of 12.7 mm or morekg
7304.29.4180Having an outside diameter exceeding 406.4 mmkg
7304.29.50Of iron or nonalloy steelFree25%
7304.29.5015Having an outside diameter not exceeding 114.3 mm:

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