# Devices, small, hydrocarbon gas powered or Hydrocarbon gas refills for small devices with release device — Postal shipping restrictions by item category For Devices, small, hydrocarbon gas powered or Hydrocarbon gas refills for small devices with release device, carrier is USPS; restriction type is restricted; scope is domestic mail: surface only (air prohibited); conditions is Hazard class 2.1, UN3150, packing group n/a; domestic mail air: Prohibited; domestic mail surface: 2A, recorded from its source on 2026-08-10. - **Item category:** Devices, small, hydrocarbon gas powered or Hydrocarbon gas refills for small devices with release device _(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 2.1, UN3150, packing group n/a; domestic mail air: Prohibited; domestic mail surface: 2A _(verified: appears in the quote below)_ ## What the source says > Devices, small, hydrocarbon gas powered or Hydrocarbon gas refills for small devices with release device 2.1 UN3150 n/a Prohibited 2A ## 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/).