# Polyester resin kit — Postal shipping restrictions by item category

For Polyester resin kit, carrier is USPS; restriction type is restricted; scope is domestic mail: surface only (air prohibited); conditions is Hazard class 3, UN3269, packing group n/a; domestic mail air: Prohibited; domestic mail surface: 3A, recorded from its source on 2026-08-10.

- **Item category:** Polyester resin kit _(verified: appears in 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: surface only (air prohibited) _(our reading, not quoted from the source)_
- **Conditions:** Hazard class 3, UN3269, packing group n/a; domestic mail air: Prohibited; domestic mail surface: 3A _(verified: appears in the quote below)_

## What the source says

> Polyester resin kit 3 UN3269 n/a Prohibited 3A

## Source

- https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf

Last verified: 2026-08-10. Review by: 2027-08-10.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).