Fused Silica Glass Block from Mexico
Solid block of fused silica glass cast in rectangular form for machining into precision components like telescope mirrors. Classified under HTS 7001.00.10.00 for glass in the mass of fused quartz, retaining mass character post-annealing.
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
• Document annealing only; any grinding/polishing disqualifies from 'in the mass' status
• Specify transmission spectrum (UV to IR); affects end-use declarations for optics vs refractories
• Insure against thermal shock; recommend heated containers for transoceanic shipping