# HS code 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)

> HS code 6903.20 covers 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). It sits in heading 69.03 (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) in chapter 69 (ceramic products). Other goods of heading 69.03 are classified under 6903.10 (containing by weight more than 50 % of free carbon) or 6903.90 (other).

Source: https://staging.border.bot/hs-codes/690320
Last updated: 13 October 2026

[HS codes](https://staging.border.bot/hs-codes) / [Chapter 69](https://staging.border.bot/hs-codes/69) / [69.03](https://staging.border.bot/hs-codes/6903) / [6903.20](https://staging.border.bot/hs-codes/690320)

## Key facts

- HS code: 6903.20
- Covers: 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)
- Heading: [69.03: 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](https://staging.border.bot/hs-codes/6903)
- Chapter: [69: Ceramic products](https://staging.border.bot/hs-codes/69)
- Edition: HS2022
- Duty rates: [Set by each country’s tariff](https://staging.border.bot/countries)

## What this code covers

HS code 6903.20 covers 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).

The legal text of the subheading is “Containing by weight more than 50 % of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)”, in HS2022.

## What it doesn’t cover

Other goods of heading 69.03 are classified under 6903.10 (containing by weight more than 50 % of free carbon) or 6903.90 (other).

- [6903.10](https://staging.border.bot/hs-codes/690310) Containing by weight more than 50 % of free carbon
- [6903.90](https://staging.border.bot/hs-codes/690390) Other

## How it is structured

6903.20 is a six-digit subheading. Its first two digits, 69, are the chapter; the first four, 6903, are heading 69.03; the last two, 20, identify the subheading within the heading.

Countries add their own digits after these six for their national tariff lines.

- Chapter 69: Ceramic products
- Heading 69.03: 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
- Subheading 6903.20: Containing by weight more than 50 % of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)

## In other countries

No national tariff lines under 6903.20 are live on border.bot yet. Tariffs built on the Harmonized System (HS2022) use 6903.20 at six digits and add their own digits after it.

- Previous subheading: [6903.10](https://staging.border.bot/hs-codes/690310) Containing by weight more than 50 % of free carbon
- Next subheading: [6903.90](https://staging.border.bot/hs-codes/690390) Other

## Frequently asked questions

### What does HS code 6903.20 cover?

HS code 6903.20 covers 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).

### Which heading and chapter is HS code 6903.20 in?

HS code 6903.20 is in heading 69.03 (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) in chapter 69 (ceramic products).

### Where are goods of heading 69.03 classified when 6903.20 doesn’t fit?

Other goods of heading 69.03 are classified under 6903.10 (containing by weight more than 50 % of free carbon) or 6903.90 (other).

## Sources and updates

The Harmonized System legal text comes from border.bot release 1 (edition HS 2022), imported from a file, and has been live since 13 October 2026.

This page was last updated on 13 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.

Machine-readable: https://staging.border.bot/hs-codes/690320.json