# Toy Propellant Devices (UN0454 or NA0323, Division 1.4S) — Postal shipping restrictions by item category

For Toy Propellant Devices (UN0454 or NA0323, Division 1.4S), carrier is USPS; restriction type is restricted; scope is domestic mail via surface transportation only; conditions is Mailable via surface transportation with prior written permission from director, Product Classification; must meet strict requirements on size, design, and packaging; shipping paper required, recorded from its source on 2026-08-04.

- **Item category:** Toy Propellant Devices (UN0454 or NA0323, Division 1.4S) _(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 via surface transportation with prior written permission from director, Product Classification; must meet strict requirements on size, design, and packaging; shipping paper required _(unconfirmed — we could not tie this to the quote below)_

## What the source says

> Toy Propellant Devices (e.g., model rocket motors or igniters) (UN0454 or NA0323): Classified as Division 1.4S, these devices may be mailed via surface transportation with prior written permission from the director, Product Classification

## Source

- https://pe.usps.com/text/pub52/pub52c3_020.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/).