Here's what other sites are saying:
Arva Avalanche Safety Refillable Air Canister Empty Blue AIR7BOUTUSAIR. In accordance with DOT/TC regulations and International Air Transport Association (IATA table 2.3.A) regulation for baggage carried by passengers. Must be refilled by manufacturer. This is an empty canister that will need to be filled by Arva or an authorized refill center.
Arva's Reactor Avalanche Airbags are some of the lightest, most compact out there, so it only makes sense for the Arva Reactor North America Steel Cylinder to be just as light and compact. Arva makes cylinder for different continents to meet specific travel regulations. In the case for this North America option, the high-strength steel cylinder exceeds the standards set by the DOT/TC as well as the International Air Travel Association.