3D Ferrite Core Memory Stack
A three-dimensional stack of ferrite core planes mounted on fired ceramic frames, used for high-capacity technical memory in minicomputers. The ceramic components are fired after shaping and serve a technical function, qualifying under tariff item 6909.19.90 as other ceramic wares for technical uses.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 4.5% | — | 4.5% |
| 🇲🇽Mexico | 4.5% | — | 4.5% |
| 🇺🇸United States | 4.5% | — | 4.5% |
| 🇩🇪Germany | 4.5% | — | 4.5% |
| 🇯🇵Japan | 4.5% | — | 4.5% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as part of a complete minicomputer system
Memory components integrated into a computer system may be classified with the system rather than as separate ceramic wares.
If specifically designed for use in machinery for making pulp or paper
The sibling item covers ceramic rings for papermaking machinery, but not general memory stacks.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the ceramic frames are fired after shaping and not merely dried, as unfired articles are excluded from Chapter 69
• Keep technical documentation showing the memory stack's use in laboratory or technical applications to support classification
• Verify whether the item contains any excisable goods, which may affect duty calculation
Related Products under Tariff item 6909.19.90
Alumina Ceramic Evaporating Dish
An alumina-based ceramic evaporating dish, fired for use in analytical chemistry, is employed to evaporate liquids and recover precipitates. Its high-purity alumina body resists chemical attack and thermal shock, making it ideal for laboratory processes. This product falls under tariff item 6909.19.90 as ceramic ware for laboratory use.
Alumina Ceramic Thrust Bearings
Aluminum oxide (alumina) ceramic thrust bearings for precision instruments in chemical analysis labs. Fired to achieve high compressive strength and electrical insulation for technical operations, these bearings are classifiable under 6909.19.90 as other ceramic wares for technical uses.
Boron Nitride Ceramic Bearing Rollers
Boron nitride ceramic rollers for vacuum laboratory systems and chemical reactors. Hexagonal BN structure fired for lubricity and thermal shock resistance in technical uses, these rollers are classifiable under 6909.19.90 as other ceramic wares for technical uses.
Ceramic Buchner Funnel
A perforated porcelain funnel designed for vacuum filtration in chemical laboratories. It is fired after shaping to withstand corrosive filtrates and high temperatures, making it a ceramic ware for laboratory use under heading 69.09.
Ceramic Evaporating Dish
A shallow, wide porcelain dish used in laboratories to evaporate liquids and concentrate solutions. It is fired after shaping, offering resistance to acids and high temperatures, and is a ceramic ware for laboratory use.
Ceramic Filter Crucible
A porcelain crucible with a porous base designed for filtering molten materials in technical laboratories. Fired after shaping, it is a ceramic ware for chemical or technical use under heading 69.09.