SITCSection 6
U.S. imports of synthetic monofilament (67 decitex or over) and narrow synthetic textile strip (SITC 65188) totaled $16.2M in April 2026, traded with 34 countries.
Importers of Synthetic Monofilament (67 Decitex or Over) and Narrow Synthetic Textile Strip paid $1.6M in duties in April 2026 — an effective duty rate of 11% on $14.7M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataSynthetic monofilament at or above 67 decitex with a cross-section no greater than 1 mm, along with synthetic textile strip or straw not exceeding 5 mm in width, serve highly specialized end uses ranging from fishing line and brush bristles to woven seating and agricultural shade cloth. The decitex floor and the 1 mm cross-section ceiling are both hard classification limits — product falling outside either dimension shifts to a different tariff heading. Depending on the polymer type (nylon, polyester, polypropylene) and country of origin, these products may carry antidumping or Section 301 exposure, making precise technical specifications essential for correct entry.
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Monofilament is a single extruded filament with a round or near-round cross-section, classified here when it is 67 decitex or over and no more than 1 mm across. Synthetic textile strip (sometimes called 'straw') is a flat, tape-like extruded form no wider than 5 mm; both forms are covered by this heading but serve different downstream applications such as weaving versus fishing or brush manufacturing.
At the SITC level, polymer type (nylon, polyester, polypropylene, etc.) does not change the heading, but it becomes relevant at the HTS 10-digit level for duty-rate and trade-remedy purposes. Importers should verify whether the specific polymer is subject to antidumping orders or Section 301 measures before entry.
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Monthly import values over time