Harmonized System
U.S. imports of wood wool (excelsior) & wood flour (HS 440500) totaled $283K in August 2026, imported from 6 countries.
Importers of Wood Wool (Excelsior) & Wood Flour paid $31K in duties in August 2026, an effective tariff rate of 10.77% of the $283K imported — duty actually collected as a share of that value, not the published tariff schedule. Wood Wool (Excelsior) & Wood Flour imports of $283K in August 2026 ran 199% above the year-to-date monthly average of $95K.
Last updated: August 2026 dataWood wool — commercially known as excelsior — consists of fine, curled wood shavings used for protective packaging, horticultural growing media, and acoustic panels, while wood flour is a finely milled powder used as a filler in plastics, explosives, and wood-composite products. Germany is the leading US supplier under this single-line heading (4405000000), with Ukraine and the United Kingdom also contributing. Both products are classified by their physical form rather than species, so importers must ensure that particle size and processing method align with the heading's scope rather than with wood-based panel or pellet classifications. The heading carries no mandatory admissibility review, but accurate product description on entry documents is important given the range of industrial end uses.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
25 shipments/mo
Wood flour is distinguished by its very fine particle size, typically passing through a specific mesh screen, and its powdery consistency. Coarser material — such as sawdust, wood chips, or wood particles — generally falls under other headings in Chapter 44. If particle size is borderline, a binding ruling request to CBP can provide certainty before importation.
Wood wool used in food-contact packaging may be subject to FDA regulations governing indirect food additives, depending on the application. For horticultural use, USDA APHIS may require documentation confirming the material has been processed to eliminate pest risk. Importers should confirm applicable requirements with the relevant agency before the first shipment.
HSChapter 44
Trade Directory
List your company under HS 440500 — Wood Wool (Excelsior) & Wood Flour, so the companies trading it can find you. Be the first supplier listed.
Subheading 1 of 1 in heading 4405
Subheading 440500 · $283K of $283K
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 |
|---|---|---|---|---|---|
| 4405000000 | Wood Wool (Excelsior); Wood Flour | $283K | 10.77% | 100.00% | $31K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 4405000000 | Wood Wool (Excelsior); Wood Flour | $275K |
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.
ImportsExports
Imports
$283KYoY · free account
Exports
$275KYoY · free account
12-mo low · imports
YoY · free accountOver the twelve months to August 2026, the U.S. imported $1.5M of Wood Wool (Excelsior) & Wood Flour.
Fewer than 6 of the last 12 months reported trade above $500K; the trend chart is not shown for thin series.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
Germany and United Kingdom together supply 94% of it. United Kingdom pays 13.2% duty; Ukraine 3.2%.
customs district
destination
entry
rate provision · imports
duty collected equals 10.77% of total import value.