Code 6903 90 · Heading 6903

Other refractory ceramic retorts, crucibles, muffles, nozzles, plugs, tubes, rods and similar items, excluding fossil-silica products, refractory construction materials, and items with > 50 weight% carbon or > 50 weight% aluminium oxide

This code covers the named refractory ceramic items when they are not fossil-silica products or refractory bricks, blocks, tiles or similar construction materials. It excludes items containing > 50 weight% carbon or > 50 weight% aluminium oxide, or made from a mixture or compound of aluminium oxide and silica.

For example

A refractory ceramic crucible containing > 25 weight% but <= 50 weight% graphite, not a refractory brick, block, tile or similar construction material and not containing > 50 weight% aluminium oxide
A refractory ceramic retort containing > 25 weight% but <= 50 weight% graphite, not a fossil-silica product or refractory construction material and not containing > 50 weight% aluminium oxide

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See the official tariff text

Official tariff text

Retorts, crucibles, mufflers, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods, slide gates and other refractory ceramic goods (excl. those of siliceous fossil meals or similar siliceous earths, those of heading 6902, containing > 50% by weight of free carbon or containing > 50% by weight of alumina [Al203] or a mixture or compound of alumina and silica [SiO2])

The path to this code

Every code is reached through these choices, one level at a time.

Step 4 of 4

Step 1 · Section XIII Articles of stone, plaster, cement, asbestos, mica …
Is the item made of stone, plaster, cement, asbestos, mica or a similar material; is it a ceramic product; or is it glass or glassware?
✓
Step 2 · Chapter 69 Ceramic products 2 of 3 chapters in section XIII
What kind of ceramic product is it: a silica-earth product; refractory building material; other refractory ware; brick or similar building material; roofing or other architectural building product; pipe, gutter or pipe fitting; paving, flooring or wall-covering stone or tile; laboratory, technical or agricultural container; sanitary ware; porcelain tableware or household or toilet article; non-porcelain ceramic tableware or household or toilet article; statuette or other ornament; or another ceramic product?
✓
Step 3 · Heading 6903 Retorts, crucibles, mufflers, nozzles, plugs, suppo… 3 of 13 headings under chapter 69
Which material description applies: does the product contain > 50 weight% graphite or other carbon, or a mixture of these products; contain > 50 weight% aluminium oxide “Al2O3”, or be a mixture or compound of aluminium oxide and silica “SiO2”; or none of these?
✓
Step 4 · Subheading 6903 90 Retorts, crucibles, mufflers, nozzles, plugs, suppo… 3 of 3 subheadings under heading 6903
Does the refractory ceramic item contain > 25 weight% but <= 50 weight% graphite or other carbon, or a mixture of these products?

Full 8-digit codes

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2 codes below this one

Compare the sibling codes

6903 10 Retorts, crucibles, mufflers, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods, slide gates and other refractory ceramic goods, containing by weight > 50% free carbon (excl. refractory bricks, blocks, tiles and similar refractory ceramic constructional goods) 5.0%
6903 20 Retorts, crucibles, mufflers, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and other refractory ceramic goods, containing > 50% alumina, or a compound of alumina and silica (excl. refractory bricks, blocks, tiles and similar refractory ceramic constructional goods) 5.0%
6903 90 Retorts, crucibles, mufflers, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods, slide gates and other refractory ceramic goods (excl. those of siliceous fossil meals or similar siliceous earths, those of heading 6902, containing > 50% by weight of free carbon or containing > 50% by weight of alumina [Al203] or a mixture or compound of alumina and silica [SiO2]) you are here 5.0%

Export to Norway

What Norwegian customs charges when goods like these are imported into Norway.

69.03.9000

Other

Ordinary duty

Duty free

Goods of EU origin

Duty free You need documentation of EU origin to use this rate.

Norwegian tariff data version 1.5/1.2, last checked Aug. 3, 2026.

Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.

Export to the United Kingdom

What UK customs charges when goods like these are imported into the UK.

All 3 UK lines under this code

They all have the same duty rates shown here.

Ordinary duty

4.0%

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.

These rates apply in Great Britain. Different rules may apply for goods entering Northern Ireland.

UK tariff data version v4.0.1576, last checked Aug. 3, 2026.

Contains public sector information licensed under the Open Government Licence v3.0.

Source: UK Department for Business and Trade (data.api.trade.gov.uk).

Check the neighbouring codes

The codes just before and after this one, in case a nearby group fits better.

See all 3 codes at this level

Previous code 6903 20

Retorts, crucibles, mufflers, nozzles, plugs, supports, cupels, tubes…

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