Helium-Neon Laser Plasma Tube from Japan
HeNe laser plasma tubes generate visible laser light through gas discharge excitation of helium-neon mixture. Used in alignment and metrology, they qualify as gas electron tubes under HTS 8540.89.0020.
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
• Mirror coating specs and gas pressure stability docs required
• Lifetime rating (hours) helps establish tube vs. complete laser status
• Optical bench mounting features affect parts classification