Unmounted Double-Convex BK7 Lens from China
An unmounted double-convex lens made from BK7 borosilicate crown glass, used in telescopes and microscopes. It is an optically worked glass lens, not excluded by chapter notes, and falls under tariff item 9001.90.00.
Duty Rate — China → Canada
0%
Import Tips
• Confirm the lens is optically worked (polished) and unmounted; unworked glass falls under other headings
• Declare the BK7 glass composition for accurate classification
• Use protective packaging to prevent edge chips during customs handling