Fused Silica Glass Block from Canada
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 — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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