6903.90.00
Other
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
Data provenance: Rates from HTS Revision 16 (Aug 15, 2026); trade measures verified against CBP CSMS and Federal Register notices through Aug 15, 2026.
Duty rates
Column 1 (General / MFN)
Free
Column 2 (Non-NTR)
30%
The rates above are statutory column rates. Trade remedies in Chapter 99 (Section 301, 232, IEEPA, reciprocal) and FTA preferences can change the duty owed on a given entry — see below.
Trade measures (Chapter 99)
9903.90.08
35%
ActiveArticles the product of the Russian Federation, as provided for in U.S. note 30(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 30(b) to this subchapter
Applies to origin: RU, BY
Effective from April 5, 2025
Rate-change history
What the rate was before, and when it changed. The government schedule replaces each revision in place; we keep the timeline.
-
NEW_PROGRAM Executive Order Feb 1, 2026 — Reciprocal Tariff (FR 2026-03824)
Section 122 reciprocal surcharge in effect — additional 10% on most imports through July 24, 2026
See the change → -
Base rate HTS 2023
Column 1 general rate set to Free.
Related CBP rulings
Country of Origin of Slide Gate Refractories used in Metallurgy or Metal Foundries (Top Plates, Gate Plates and Center Plates); Section 301 Trade Remedies
Your client, Vesuvius, designs and manufactures components used in steel making or metal foundries for the casting of steel and other metals. Among the components Vesuvius produces are parts used in ladles, that is, the vessels that transpo
The tariff classification of refractory ceramic tap-hole products from China.
The merchandise under consideration consists of refractory ceramic tap-hole products, comprised mainly of fused magnesia. Tap-holes are fully pre-assembled, hollow, cylindrical refractory tubes, that are either segmented or one piece, isost
The tariff classification of ceramic Metallist Intermetallic Composite Boats from China.
The merchandise under consideration, based on the submitted literature, is identified as Metallist Intermetallic Composite (IMC) boats. The Metallist IMC boats are made of ceramic, composed of boron nitride and titanium diboride hot-pressed
The tariff classification of furnaces and other equipment from Canada
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The tariff classification of ceramic roller blanks
You identify the imported ceramic roller blanks as styles Sillimantin 60 and Sillimantin 65. Each is approximately 100 inches in length with an outside diameter of 1½ inches. Upon entry into the U.S., the ceramic roller blanks, which are in
The tariff classification of a ceramic refractory filter from France.
The merchandise in question is an extruded ceramic filter, measuring approximately 4 inches in diameter and ½ inch in width, used in the manufacture of investment castings for the aircraft, aerospace and industrial gas turbines industries.
Protest 0901-94-101205; refractory articles; well blocks, solid plugs, bell bricks, center risers, bottom guides, spider bricks, runner bricks, up-gates; Additional U.S. Note 2, Chapter 69; refractory bricks; 6902.20.50; other refractory articles; 6903.20.00; other refractory ceramic goods; EN 69.02 and 69.03; John C. Rogers & Co., Inc., a/c Hoeganaes Sponge Iron Corp; Pittsburgh Plate Glass Company; HRLs 086441, 087895, 061716, 083745, and 955836
The refractory articles at issue are well blocks, solid plugs, bell bricks, center risers, bottom guides, spider bricks, runner bricks, and up-gates. The protestant states that the refractory articles are used in the "bottom pour system" by
The tariff classification of the Tetley Technegas Generatorand Technegas Patient Administration Sets from Australia.
The tariff classification of the Tetley Technegas Generatorand Technegas Patient Administration Sets from Australia.
The tariff classification of ceramic evaporation boats fromGermany.
It is stated that boat A20 is composed by weight of at least 45% of titanium diboride, 20% boron nitride and 20% aluminum nitride, while boat A0 is noted to be composed of at least 46% of titanium diboride and 50% boron nitride. These evapo
Other codes in heading 6903
Duty by origin country
The rate above is the statutory base. Total landed duty depends on origin — see the calculated rate for 6903.90.00 from each major US trading partner.
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