Flexible tubing of base metal — HTS 8307
Flexible tubing of base metal, with or without fittings
Chapter 83 › Heading 8307
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS heading 8307 groups flexible tubing made from base metal, whether or not the tubing has fittings attached. “Base metal” generally includes metals such as iron or steel, copper, aluminum, nickel, and their alloys. The heading is about the tubing’s flexible construction and metal composition—not simply any metal pipe or hose.
To reach the correct 8-digit HTSUS code, first confirm that the product belongs in heading 8307 rather than a heading for rigid tubes, plastic or rubber hoses, machinery parts, or another specialized product. Then use the heading’s subheadings and statistical suffixes, which commonly distinguish the base metal and the tubing’s type or construction. Review the full product description, including whether fittings are included, and verify the current HTSUS provisions and applicable classification notes. A customs broker or classification specialist may be needed for borderline products.
What to check
- Confirm that the tubing is genuinely flexible and made primarily of base metal; do not classify it solely by its use or appearance.
- Identify the exact base metal and alloy, such as iron or steel, copper, aluminum, or another metal, using specifications or supplier documentation.
- Describe the construction accurately, including corrugation, braiding, layering, lining, and whether fittings are attached or supplied with the tubing.
- Compare the product with the complete heading 8307 subheadings and 8-digit descriptions, including any relevant legal notes and unit-of-measure requirements.
- Keep technical drawings, material certificates, photographs, and fitting details to support the classification, and seek broker or customs advice if more than one heading appears plausible.
HTS heading 8307 summary
Flexible tubing of base metal is a 4-digit product category containing 0 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Sub-categories
| Code | Description |
|---|---|
| 8307.10 | Of iron or steel |
| 8307.90 | Of other base metal |
Common questions
What products fall under HTS heading 8307?
Flexible tubing of base metal, with or without fittings. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.