# Tear gas devices with more than 2 percent tear gas substances, by mass · USPS — Mailing and air-carriage restrictions by item category For Tear gas devices with more than 2 percent tear gas substances, by mass · USPS, item category is Tear gas devices with more than 2 percent tear gas substances, by mass; carrier is USPS; restriction type is prohibited; scope is domestic mail (air and surface); conditions is Hazard class 6.1, NA1693, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited, recorded from its source on 2026-08-10. - **Item category:** Tear gas devices with more than 2 percent tear gas substances, by mass _(verified: appears in the quote below)_ - **Carrier:** USPS _(our reading, not quoted from the source)_ - **Restriction type:** prohibited _(our reading, not quoted from the source)_ - **Scope:** domestic mail (air and surface) _(our reading, not quoted from the source)_ - **Conditions:** Hazard class 6.1, NA1693, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited ## What the source says > Tear gas devices with more than 2 percent tear gas substances, by mass 6.1 NA1693 I, II Prohibited Prohibited ## Source - https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf Last verified: 2026-08-10. Review by: 2027-08-10. Part of [Mailing and air-carriage restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).