# Model fuel for glow-plug engines — Postal shipping restrictions by item category

For Model fuel for glow-plug engines, carrier is USPS; restriction type is restricted; scope is domestic mail via surface transportation only; conditions is Mailable only if qualifies as Limited Quantity surface material and meets quantity limitations and packaging requirements; Packaging Instruction 3A must be followed, recorded from its source on 2026-08-04.

- **Item category:** Model fuel for glow-plug engines _(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 only _(our reading, not quoted from the source)_
- **Conditions:** Mailable only if qualifies as Limited Quantity surface material and meets quantity limitations and packaging requirements; Packaging Instruction 3A must be followed _(unconfirmed — we could not tie this to the quote below)_

## What the source says

> Model Fuel (for Glow-Plug Engines): A flammable liquid with a flashpoint ranging from 65° F to 75° F. It is mailable only if it qualifies as a Limited Quantity surface material

## Source

- https://pe.usps.com/text/pub52/pub52c3_022.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/).