# Flammable solids qualifying as Limited Quantity surface materials — Postal shipping restrictions by item category

For Flammable solids qualifying as Limited Quantity surface materials, carrier is USPS; restriction type is restricted; scope is domestic mail via surface transportation; conditions is Flammable solids that qualify as Limited Quantity surface materials are permitted in domestic mail via surface transportation, recorded from its source on 2026-08-04.

- **Item category:** Flammable solids qualifying as Limited Quantity surface materials _(unconfirmed — we could not tie this to the quote below)_
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** domestic mail via surface transportation _(our reading, not quoted from the source)_
- **Conditions:** Flammable solids that qualify as Limited Quantity surface materials are permitted in domestic mail via surface transportation

## What the source says

> Domestic Mail via Surface Transportation: Flammable solids that qualify as Limited Quantity surface materials are permitted.

## Source

- https://pe.usps.com/text/pub52/pub52c3_023.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/).