Sapphire Ingot for Optical Window Substrates from Mexico
Czochralski-grown synthetic sapphire (aluminum oxide) ingot weighing more than 2.5 grams, used for laser windows and scratch-resistant displays. HTS 3824.99.1100 applies to cultured crystal ingots excluding Chapter 90 optical elements. Sapphire's extreme hardness (9 Mohs) makes it ideal for aerospace and military optics.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include boule diameter/length measurements proving >2.5g weight threshold for 3824.99.1100 subheading
• Distinguish from Chapter 69 ceramic articles by providing single-crystal X-ray diffraction certification