HTS Code	Description	General	Special	Other	Units
	Casing:
	Of iron or nonalloy steel:
7304.29.10	Threaded or coupled	Free	—	20%
	Having an outside diameter less than 215.9 mm:
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.29.20	Other	Free	—	1%
	Having an outside diameter less than 215.9 mm:
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
	Of other alloy steel:
7304.29.31	Threaded or coupled	Free	—	28%
	Having an outside diameter less than 215.9 mm:
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.29.41	Other	Free	—	8.5%
	Having an outside diameter less than 215.9 mm:
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
	Tubing:
7304.29.50	Of iron or nonalloy steel	Free	—	25%
	Having an outside diameter not exceeding 114.3 mm:
7304.29.61	Of other alloy steel	Free	—	35%