Fabry-Perot Interferometer Spacer from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, 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