Mica Window Strips for Furnaces
Transparent strips of split mica used as peephole windows in high-temperature furnaces and stoves. They are worked mica articles under HTS 6814.90.00.00, valued for heat resistance without melting or cracking.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If assembled into furnace parts
Mica strips fitted into furnace assemblies become parts of industrial ovens under heading 8417.
If made of glass instead of mica
Glass furnace peepholes fall under Chapter 70 as glass articles of fused quartz or similar.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Include thickness and transparency specs to confirm as worked mica, not raw sheets
• Avoid framing; framed windows may classify as furnace parts under 8417 or 8516
• Certify heat tolerance over 500°C to differentiate from plastic alternatives
Related Products under HTS 6814.90.00.00
Mica Electrical Insulation Sheets
Thin sheets made from worked mica, often split or cleaved, used for electrical insulation in motors and transformers. They fall under HTS 6814.90.00.00 as articles of worked mica not specified elsewhere, providing high dielectric strength and thermal resistance.
Agglomerated Mica Heating Element Plates
Plates made from reconstituted mica bonded with binders, shaped for use in electric heaters and toasters. Classified under HTS 6814.90.00.00 as agglomerated articles of mica designed for high-temperature applications.
Reconstituted Mica Gaskets and Seals
Die-cut gaskets from agglomerated mica sheets for sealing high-pressure steam pipes and valves. HTS 6814.90.00.00 covers these as articles of reconstituted mica for industrial sealing.
Split Mica Capacitor Dielectrics
Ultra-thin split mica layers silvered on one side for use as dielectrics in high-frequency capacitors. As worked mica articles, they are under HTS 6814.90.00.00 before final capacitor assembly.
Mica Shim Stock Sheets
Precision-cut sheets of worked mica used as shims for machinery alignment in precision equipment. Classified in HTS 6814.90.00.00 as other articles of worked mica for industrial spacing.
Phlogopite Mica Lantern Globes
Molded phlogopite mica globes for outdoor lanterns, allowing light transmission while resisting weather. These are articles of worked mica under HTS 6814.90.00.00.