| Tariff Classification |
| section 18 | Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; clocks and watches; musical instruments; parts and accessories thereof |
| chapter 90 | Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof |
| 90.13 | Lasers, other than laser diodes; other optical appliances and instruments, not specified or included elsewhere in this Chapter: |
| 9013.10 | －Telescopic sights for fitting to arms; periscopes; telescopes designed to form parts of machines, appliances, instruments or apparatus of this Chapter or Section XVI |
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