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U.S. exports of synthetic monofilament, nesoi (67 decitex or more, cross-section not exceeding 1 mm) (HS 540419) totaled $15.2M in July 2026.
Importers of Synthetic Monofilament, NESOI (67 Decitex or More, Cross-Section Not Exceeding 1 mm) paid $835K in duties in July 2026 — an effective duty rate of 17% on $4.9M in dutiable value, based on actual customs collections rather than the published tariff schedule. Synthetic Monofilament, NESOI (67 Decitex or More, Cross-Section Not Exceeding 1 mm) imports of $6.0M in July 2026 ran 20% above the year-to-date monthly average of $5.0M.
Last updated: July 2026 dataNylon, polyester, and other non-elastomeric, non-polypropylene synthetic monofilaments meeting the 67-decitex and 1 mm cross-section thresholds land here as the residual 'NESOI' category within heading 5404. The US schedule carves out a dedicated line for racket strings (5404191000) — a commercially distinct end-use — alongside separate lines for nylon/polyamide (5404198020), polyester (5404198040), and all other synthetic types (5404198080). Japan is the leading supplier, followed by Mexico and Germany, reflecting both precision manufacturing capability and proximity-driven supply chains. Correct polymer identification is critical because misidentifying nylon as polyester, or vice versa, shifts the applicable tariff line.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
253 shipments/mo
Racket strings (5404191000) are distinguished because they have a specific end-use and cross-sectional dimension range (1–5 mm) that sets them apart from general-purpose monofilament. This dedicated line allows CBP to apply a distinct duty rate and facilitates trade statistics for the sporting goods sector. Importers must confirm the product is actually intended and suitable for use as racket strings to claim this classification.
CBP expects a manufacturer's specification sheet or laboratory analysis confirming the polymer type (e.g., nylon 6, nylon 6,6, polyethylene terephthalate). For blended compositions, the predominant polymer by weight governs classification. A licensed customs broker can advise on whether a binding ruling from CBP is warranted for novel or ambiguous polymer blends.
HSChapter 54
ImportsExports
Imports
$6.0MYoY · Pro
Exports
$15.2MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Subheading 2 of 4 in heading 5404
Subheading 540419 · $6.0M of $23.4M
Supplier Network
Get discovered by U.S. importers searching for HS 540419 — Synthetic Monofilament, NESOI (67 Decitex or More, Cross-Section Not Exceeding 1 mm). Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 5404198080 | Syn Mnfil, >=67 Dec, No Cross-Sec Dim 1-5mm, NESOI | $3.1M | 13.79% | 95.98% | $426K |
| 5404198020 | Syn Mnfil >=67 Decitex, Nylon/Oth Polyamide, <=1mm | $1.4M | 8.61% | 50.45% | $121K |
| 5404198040 | Syn Mnfil Poly, >=67 Dec,No Cross-Sec Dim, 1-5mm | $1.1M | 22.61% | 77.69% | $241K |
| 5404191000 | Syn Monofil Racket Strings, X-Dimen (1-5) Mm | $410K | 11.21% | 88.67% | $46K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Exports · July 2026
destination
Mexico and Canada together take 77% of it.
customs district
origin
entry
rate provision · imports
16.8% enters free of duty; the effective duty rate is 13.97%.