Wood wool (excelsior); wood flour
1 declarable lines
Heading 4405 covers two forms of wood material: wood wool, also called excelsior, and wood flour. It is not split into multiple declarable lines in this list; the single line is 4405.00.00.00, with a general (MFN) duty rate of 3.2%.
Products in this heading
- Wood wool (excelsior) for packing and cushioning
- Wood wool for pet bedding
- Wood wool for erosion control blankets
- Fine wood flour used as a filler
- Wood flour for composite materials
- Wood flour for incense or sachet blends
- Wood wool for craft and floral use
How to choose the right subheading
- Confirm the material is wood, not another fiber or plant material.
- Check the physical form: long thin curled strands point to wood wool (excelsior).
- Check the particle size: fine powder points to wood flour.
- Confirm the wood is loose, not agglomerated with resin into board.
- Confirm the product is not charcoal, sawdust, chips or wood waste.
Often confused with
- Heading 4401Sawdust
Sawdust and wood waste are covered in heading 4401, not wood flour.
- Heading 4401Wood chips and particles
Chips and particles are not the fine powder or strands of heading 4405.
- Heading 4402Wood charcoal
Charcoal is a charred product, not wood wool or wood flour.
- Heading 4410Particle board and OSB
Agglomerated board made with resin is a board product, not loose wood flour.
- Heading 4404Chipwood and split poles
Chipwood is a rough wood stick product, not wood wool.
Frequently asked questions
What is the HTS code for wood wool?
Wood wool (excelsior) is classified under 4405.00.00.00, with a general (MFN) duty rate of 3.2%.
What is the duty on wood flour?
Wood flour is classified under 4405.00.00.00 and pays a general (MFN) duty rate of 3.2%.
How do I classify wood wool versus wood flour?
Both are classified in 4405.00.00.00 at a 3.2% general (MFN) rate; choose based on form, long strands for wood wool and fine powder for wood flour.
Guide written from the official schedule text. Rates quoted are general (MFN) rates; check the line page for trade agreement rates and the classification of your exact product.