Eject Inflator powered by small carbon dioxide cartridge. Includes one cartridge. Additional cartridges sold separately. Simpson's Eject Helmet Removal System is a small air bladder that fits easily into any helmet, without changing its fit or feel. In the event of a crash First Responders can help reduce the risk of secondary neck or spine injuries by inflating the Eject System which gently lifts the helmet off the head. NOTE: Can only ship Ground to USA and Canada. Will have Hazardous Material Limited Quantities box label.