Fabry-Perot Interferometer Spacer
A precision invar spacer tube that maintains cavity length in Fabry-Perot laser spectrum analyzers. This spacer is a critical part of the interferometer, ensuring accurate wavelength measurement in laser systems.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the spacer is sold as part of a complete interferometer
Complete optical instruments may be classified in heading 90.13 when not presented as parts.
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 spacer is classified as a part of an optical instrument, not as a general metal article
• Verify the invar material does not affect classification
• Keep the invoice showing its specific use in interferometers
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