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HSChapter 51
U.S. imports of wool tops and other combed wool (not in fragments) (HS 510529) totaled $179K in April 2026, traded with 19 countries.
Importers of Wool Tops and Other Combed Wool (Not in Fragments) paid $26K in duties in April 2026 — an effective duty rate of 15% on $177K in dutiable value, based on actual customs collections rather than the published tariff schedule. Wool Tops and Other Combed Wool (Not in Fragments) imports of $179K in April 2026 ran 37% below the year-to-date monthly average of $284K.
Last updated: April 2026 dataContinuous wool tops — the primary worsted-spinning input produced by combing long-staple wool into aligned, parallel fiber — are classified under tariff line 5105290000 and are a foundational commodity for fine suiting, hosiery, and technical textile production. Uruguay and the United Kingdom are the leading US suppliers, with China, Australia, and Argentina also contributing; the Southern Hemisphere origins reflect the dominance of Merino and Corriedale breeds in fine-wool production.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Worsted mills generally specify fiber diameter in microns (e.g., 18–22 microns for fine Merino tops), staple length, vegetable matter content, and yield percentage. These specifications are typically documented in a wool test certificate issued by an accredited testing laboratory and accompany the commercial invoice. Misrepresentation of micron count can affect both classification and downstream product labeling compliance.
Both subheadings fall within the same HTS chapter and carry similar duty structures, but they are distinct tariff lines and must be classified based on the physical form of the combed wool at the time of importation. Continuous tops (510529) and fragmented combed wool (510521) should not be commingled on a single entry line; separate line items are required if both forms are present in a shipment.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| UNITED KINGDOM | $124K | -- | -$124K |
| ARGENTINA | $17K | -- | -$17K |
| CHINA | $15K | -- | -$15K |
| PERU | $12K | -- | -$12K |
| CANADA | $2K | $4K | +$3K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 5105290000 | WOOL TOPS AND OTHER COMBED WOOL (NOT IN FRAGMENTS) | $179K | 14.59% | $26K |
WOOL TOPS AND OTHER COMBED WOOL (NOT IN FRAGMENTS)
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 5105290000 | WOOL TOPS AND OTHER COMBED WOOL (NOT IN FRAGMENTS) | $4K |
WOOL TOPS AND OTHER COMBED WOOL (NOT IN FRAGMENTS)
250 kg
YARN, COMBED WOOL, NOT RETAIL, NOT UN 85% WT WOOL
HS 510710
WOVEN FABRICS OF COMBED WOOL OR FAH >=85% WL/FAH O
HS 511219
YARN & FINE AN HAIR, RETAIL PK, NOT UN 85% WL OR H
HS 510910
YARN, CARDED WOOL, NOT RETAIL, NOT UN 85% WT WOOL
HS 510610
WOV FAB CRD WL/FAH >=85% WL/FAH NESOI
HS 511119
WV FB CMB WL/FAH >=85% WL/FAH WEIGHT <=200G/M2
HS 511211
| State | Imports | Exports | Balance |
|---|---|---|---|
| Maine | $42K | -- | -$42K |
| California | $40K | -- | -$40K |
| Oregon | $23K | -- | -$23K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LOGAN AIRPORT, MA | $42K | -- | -$42K |
| SEATTLE-TACOMA INTERNATIONAL AIRPORT, WA | $28K | -- | -$28K |
| PORTLAND INTERNATIONAL AIRPORT, WA | $23K | -- | -$23K |