H3R Performance brings aviation style Halotron® 1 fire extinguishers to the automotive enthusiast with HalGuard™ premium clean agent fire protection. HalGuard™ is no ordinary automotive fire extinguisher. It contains Halotron® 1, an electrically non-conductive "clean" extinguishing agent that rapidly turns into a gas. Halotron® 1 has passed extensive testing by Underwriters Laboratories, and meets FAA requirements. It can be found on commercial aircraft, and is used by airport fire fighters.