# Small compressed gas cylinders and cartridges in or with a device (CO2) · FAA (air transport) — Flying with restricted items: FAA, TSA and IATA baggage and air cargo rules

For Small compressed gas cylinders and cartridges in or with a device (CO2), authority is FAA (air transport); restriction type is restricted; scope is checked baggage only; not allowed in carry-on; conditions is Up to four cartridges/cylinders of nonflammable gas; each must not exceed 50 ml (equivalent to a 28 g CO2 cartridge); larger cylinders are forbidden unless covered by another exception, recorded from its source on 2026-08-10.

- **Item or substance:** Small compressed gas cylinders and cartridges in or with a device (CO2)
- **Authority:** FAA (air transport) _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** checked baggage only; not allowed in carry-on _(our reading, not quoted from the source)_
- **Conditions:** Up to four cartridges/cylinders of nonflammable gas; each must not exceed 50 ml (equivalent to a 28 g CO2 cartridge); larger cylinders are forbidden unless covered by another exception.

## What the source says

> (25) Small cartridges fitted into or securely packed with devices with no more than four small cartridges of carbon dioxide or other suitable gas in Division 2.2, without subsidiary risk with the approval of the operator. The water capacity of each cartridge must not exceed 50 mL (equivalent to a 28 g cartridge).

## Source

- https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-175/subpart-A/section-175.10

Last verified: 2026-08-10. Review by: 2027-08-10.
Part of [Flying with restricted items: FAA, TSA and IATA baggage and air cargo rules](https://referencesource.org/air-travel-item-restrictions/).