Fabry-Perot Interferometer Spacer from Canada
Precision invar spacer tube maintaining cavity length in Fabry-Perot laser spectrum analyzers. Falls under HTS 9013.90.70.00 as an optical instrument part.
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
• Specify thermal expansion coefficient (1.2×10^-6/°C) proving precision function
• Include finesse calculation data showing spacer criticality
• Document material certification for dimensional stability