Last year a good friend of ours lost their home and car collection to a fire. For those of us that worry about a garage fire and seeing our loved ones burn to the ground while we're working on them, or having them catch on fire when we're not around because of some silly electrical short, I have the solution to prevent an extremely sad outcome. Factor in losing your life's collection of tools, unique parts, memorabilia or your entire home and the cost of these unmanned extinguishers is a small pittance for the protection and peace of mind they deliver. Simply attach one of these unmanned extinguishers to the ceiling or wall and when the room reaches a pre-determined temperature they'll go off automatically. The large ceiling mounted extinguisher has an overall height of 17" and 9 5/8" in diameter, weighs 34.5 pounds, of which 26.4 pounds of the weight is type A-B-C rated multi-purpose dry powder and propellant. This unit releases the dry powder when the room reaches a temperature of 155° F. The wall mounted extinguisher has an overall height of 14 3/4" and 4 5/16" in diameter, weighs 10.3 pounds, of which 6.6 pounds is dry powder and propellant. Release temperature on this unit is 175° F. Both CE approved units have a sprinkler type valve that distributes powder in all directions. Have one above every car, over parts washer, wine cellar, laundry room, furnace room, tool shed, basement storage, over your spare gas cans, attic area for electrical fires, etc. Both units include the mounting brackets. Ceiling extinguisher needs to be mounted into a stud or beam due to the weight. The wall mounted unit is light enough to mount anywhere.