Czochralski Crystal Puller Mold Base
A precision mold base used in Czochralski crystal pullers for growing monocrystalline silicon boules in semiconductor wafer manufacturing. It is classified under this tariff item as a mold base for metal or metal carbides.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | +15.0% | 15% |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the mold base is for injection molding of metal
Injection molds for metal are classified under this more specific subheading.
If the mold base is a machine part rather than a mold
If the base is a component of the crystal puller machine, it may be classified as a machine part under heading 8479.
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 mold base is not a part of the crystal puller machine itself, as that would be classified under a different heading
• Provide evidence that the base is used as a mold in the crystal growth process
• Check if the base is made of metal carbide to confirm classification
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