This is an original antique red comet brand, firefighter, grenade, fire extinguisher It was made to hangover fire prone areas and has a heat sensitive trigger mechanism that would cause the glass to break over the fire It could also be used as a standard fire grenade, and could be thrown at the base of a small fire in your home or workplace It would hopefully extinguish the fire, or give you enough time to escape Very tough to find in this great condition It measures 10” long and 3” at the widest Selling more for decor or collector item Empty and use it as decor even in the garden Great gift for the fireman in your life From 1920’s- approximately 100 years old