Mica RF Window Disks from United States
Mica RF window disks are circular pieces of worked mica that are transparent to radio frequencies, used in high-power RF transmitters as vacuum windows. They are made from high-quality muscovite mica, carefully cleaved and shaped. These disks are classified under tariff item 6814.90.00 as articles of worked mica.
Duty Rate — United States → Canada
0%
Import Tips
• Ensure the disks are not considered parts of electrical apparatus, which could shift classification to Chapter 85
• Provide documentation on the mica grade and manufacturing process
• Verify if any export permits are needed for the mica source, as CBSA may require proof of origin