Unmounted Double-Convex BK7 Lens from Canada
A precision double-convex lens made from BK7 borosilicate crown glass, used in telescopes and microscopes. Falls under HTS 9001.90.40.00 as an unmounted, optically worked glass lens not excluded by chapter notes. Provides symmetrical focusing for imaging systems.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Supply interferometry test reports proving optical figure accuracy
• Label with exact diameter, focal length, and coating status
• Avoid bulk packing; individual protective cases reduce breakage claims