# United States tariff line 9001.90.50.00: Prisms

> In the United States tariff, line 9001.90.50.00 covers prisms. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 9001.90 in heading 90.01 (chapter 90).

Source: https://border.bot/countries/united-states/hs-codes/9001905000
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 90](https://border.bot/countries/united-states/hs-codes/90) / [9001.90](https://border.bot/countries/united-states/hs-codes/900190) / [9001.90.50.00](https://border.bot/countries/united-states/hs-codes/9001905000)

## Key facts

- Tariff line: 9001.90.50.00
- Covers: Prisms
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [9001.90](https://border.bot/hs-codes/900190)

## What this line covers

In the United States tariff, line 9001.90.50.00 covers prisms.

Its legal text is “Prisms”, read under “Other”.

## How it is structured

It falls under HS subheading 9001.90 in heading 90.01 (chapter 90). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 90: Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof
- Heading 90.01: Optical fibers and optical fiber bundles; optical fiber cables other than those of heading 8544; sheets and plates of polarizing material; lenses (including contact lenses), prisms, mirrors and other optical elements, of any material, unmounted, other than such elements of glass not optically worked
- Subheading 9001.90: Other
- Line 9001.90.50.00: Prisms

## Duty

Goods under this line enter free of general (MFN) duty.

## In other countries

No other national tariff on border.bot has live lines under 9001.90 yet.

- [The Harmonized System text for 9001.90](https://border.bot/hs-codes/900190)

## Other lines under 9001.90

- [9001.90.40.00](https://border.bot/countries/united-states/hs-codes/9001904000) Lenses
- [9001.90.60.00](https://border.bot/countries/united-states/hs-codes/9001906000) Mirrors
- [9001.90.80.00](https://border.bot/countries/united-states/hs-codes/9001908000) Halftone screens designed for use in engraving or photographic processes
- [9001.90.90.00](https://border.bot/countries/united-states/hs-codes/9001909000) Other

- Previous line: [9001.90.40.00](https://border.bot/countries/united-states/hs-codes/9001904000) Lenses
- Next line: [9001.90.60.00](https://border.bot/countries/united-states/hs-codes/9001906000) Mirrors

## Frequently asked questions

### What does tariff line 9001.90.50.00 cover in the United States tariff?

In the United States tariff, line 9001.90.50.00 covers prisms.

### What is the general (MFN) duty on 9001.90.50.00 in the United States?

Goods under this line enter free of general (MFN) duty.

## 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/9001905000.json