# United States tariff lines under HS 6903.20

> The United States tariff splits HS 6903.20 (other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths, containing by weight more than 50 % of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)) into 1 national line: 6903.20.00.00 (containing by weight more than 50 percent of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)). Every United States line under 6903.20 is free of general (MFN) duty.

Source: https://border.bot/countries/united-states/hs-codes/690320
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 69](https://border.bot/countries/united-states/hs-codes/69) / [6903.20](https://border.bot/countries/united-states/hs-codes/690320)

## Key facts

- HS subheading: [6903.20](https://border.bot/hs-codes/690320)
- Duty (MFN): Free
- National lines: 1
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 69: Ceramic products

## United States lines under 6903.20

The United States tariff splits HS 6903.20 (other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths, containing by weight more than 50 % of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)) into 1 national line: 6903.20.00.00 (containing by weight more than 50 percent of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)).

Every United States line under 6903.20 is free of general (MFN) duty.

- [6903.20.00.00](https://border.bot/countries/united-states/hs-codes/6903200000) Containing by weight more than 50 percent of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2). Duty (MFN): free

## In other countries

No other national tariff on border.bot has live lines under 6903.20 yet.

- [The Harmonized System text for 6903.20](https://border.bot/hs-codes/690320)

- Previous subheading: [6903.10](https://border.bot/countries/united-states/hs-codes/690310) Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths
- Next subheading: [6903.90](https://border.bot/countries/united-states/hs-codes/690390) Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 6903.20?

The United States tariff splits HS 6903.20 (other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths, containing by weight more than 50 % of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)) into 1 national line: 6903.20.00.00 (containing by weight more than 50 percent of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)).

### What is the duty on HS 6903.20 in the United States?

Every United States line under 6903.20 is 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/690320.json