# HTS Section XVIII: Optical, Photographic, Measuring, Medical Instruments

> Section overview from the USITC Harmonized Tariff Schedule on [PlainTariff](https://plaintariff.com/).

## At a glance

- **Chapters:** 3
- **Tariff lines:** 1,083
- **Average dutiable MFN rate:** 2.8%
- **Corpus rank (avg dutiable rate):** #17 of 20
- **Duty-free share:** 50% of 507 rated lines

## Chapters in this section

- [Chapter 90: Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof](https://plaintariff.com/chapter/chapter-90-optical-photographic-cinematographic-measuring-checking-precision-medical-or-surgical) — avg 1.0%
- [Chapter 91: Clocks and watches and parts thereof](https://plaintariff.com/chapter/chapter-91-clocks-and-watches-and-parts-thereof) — avg 4.6%
- [Chapter 92: Musical instruments; parts and accessories of such articles](https://plaintariff.com/chapter/chapter-92-musical-instruments-parts-and-accessories-of-such-articles) — avg 2.8%

## Related tools

- [Browse all sections](https://plaintariff.com/sections)
- [Tariff calculator](https://plaintariff.com/tools/tariff-calculator)
- [Methodology & sources](https://plaintariff.com/methodology)

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*Source: U.S. International Trade Commission Harmonized Tariff Schedule. HTML canonical: https://plaintariff.com/section/xviii-optical-photographic-measuring-medical-instruments*