Analysis
Subheading 5607.50 covers of other synthetic fibers, within heading 5607. The first six digits are shared by every country that uses the Harmonized System, so this part of the code is the same in the US, UK and EU schedules; the 3 US tariff lines below it are national.
None of its 3 lines is duty-free at the general rate. Rates run from 3.6% to 7% with a median of 5.3%, so the line you choose sets the duty.
The US splits it as follows: 5607.50.25 for 3-ply or 4-ply multicolored twine having a final "S" twist… (7%), 5607.50.35 for not braided or plaited: other (201) (19.9¢/kg + 10.8%) and 5607.50.40 for of other synthetic fibers: other (669) (3.6%).
1 of the lines carry specific or compound rates (per kilogram, per dozen and so on) rather than a percentage, so their burden depends on the unit value of the goods.
Tariff lines
| Line | Description | General rate |
|---|---|---|
| 5607.50.25 | 3-ply or 4-ply multicolored twine having a final "S" twist, containing at least 10 percent by weight of cotton, measuring less than 3.5 mm in diameter (201) | 7% |
| 5607.50.35 | Not braided or plaited: other (201) | 19.9¢/kg + 10.8% |
| 5607.50.40 | Of other synthetic fibers: other (669) | 3.6% |