# HTS 8540: Thermionic, cold cathode or photocathode tubes (for example, vacuum or vapor or gas filled tubes, mercury arc rectifying tubes, cathode-ray tubes, television camera tubes); parts thereof:

> Plain-language tariff reference from the USITC Harmonized Tariff Schedule on [PlainTariff](https://plaintariff.com/).

## Duty rates

- **General (MFN) rate:** Free

## Classification path

- **Section XVI:** [Machinery; Electrical Equipment; Parts Thereof](https://plaintariff.com/section/xvi-machinery-electrical-equipment-parts-thereof)
- **Chapter 85:** [Electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles](https://plaintariff.com/chapter/chapter-85-electrical-machinery-and-equipment-and-parts-thereof-sound-recorders)
- **HTS code:** 8540

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

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*Source: U.S. International Trade Commission Harmonized Tariff Schedule. HTML canonical: https://plaintariff.com/heading/8540-thermionic-cold-cathode-or-photocathode-tubes-for-example*