# United States tariff lines under HS 3902.90

> The United States tariff splits HS 3902.90 (polymers of propylene or of other olefins, in primary forms) into 2 national lines: 3902.90.00.10 (polybutylene) and 3902.90.00.50 (other). The general (MFN) duty is 6.5% on all 2 lines.

Source: https://border.bot/countries/united-states/hs-codes/390290
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 39](https://border.bot/countries/united-states/hs-codes/39) / [3902.90](https://border.bot/countries/united-states/hs-codes/390290)

## Key facts

- HS subheading: [3902.90](https://border.bot/hs-codes/390290)
- Duty (MFN): 6.5%
- National lines: 2
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 39: Plastics and articles thereof

## United States lines under 3902.90

The United States tariff splits HS 3902.90 (polymers of propylene or of other olefins, in primary forms) into 2 national lines: 3902.90.00.10 (polybutylene) and 3902.90.00.50 (other).

The general (MFN) duty is 6.5% on all 2 lines.

- [3902.90.00.10](https://border.bot/countries/united-states/hs-codes/3902900010) Other, Polybutylene. Duty (MFN): 6.5%
- [3902.90.00.50](https://border.bot/countries/united-states/hs-codes/3902900050) Other, Other. Duty (MFN): 6.5%

## In other countries

No other national tariff on border.bot has live lines under 3902.90 yet.

- [The Harmonized System text for 3902.90](https://border.bot/hs-codes/390290)

- Previous subheading: [3902.30](https://border.bot/countries/united-states/hs-codes/390230) Polymers of propylene or of other olefins, in primary forms
- Next subheading: [3903.11](https://border.bot/countries/united-states/hs-codes/390311) Polymers of styrene, in primary forms

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 3902.90?

The United States tariff splits HS 3902.90 (polymers of propylene or of other olefins, in primary forms) into 2 national lines: 3902.90.00.10 (polybutylene) and 3902.90.00.50 (other).

### What is the duty on HS 3902.90 in the United States?

The general (MFN) duty is 6.5% on all 2 lines.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/390290.json