# Miscellaneous hazardous materials (Hazard Class 9) — international mail — Postal shipping restrictions by item category

For Miscellaneous hazardous materials (Hazard Class 9), item category is Miscellaneous hazardous materials (Hazard Class 9) — international mail; carrier is USPS; restriction type is prohibited; scope is international mail; conditions is All miscellaneous hazardous materials are prohibited internationally except certain magnetized materials and small consumer-type lithium batteries installed in their equipment, recorded from its source on 2026-08-04.

- **Item category:** Miscellaneous hazardous materials (Hazard Class 9) — international mail _(unconfirmed — we could not tie this to the quote below)_
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **Restriction type:** prohibited _(our reading, not quoted from the source)_
- **Scope:** international mail _(our reading, not quoted from the source)_
- **Conditions:** All miscellaneous hazardous materials are prohibited internationally except certain magnetized materials and small consumer-type lithium batteries installed in their equipment

## What the source says

> International Mail: All miscellaneous hazardous materials are prohibited, except for certain magnetized materials as permitted in 349.242 (a) and IMM 136.1g, and small consumer-type lithium batteries (installed in the equipment they operate)

## Source

- https://pe.usps.com/text/pub52/pub52c3_028.htm

Last verified: 2026-08-04. Review by: 2027-08-04.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).