If you've ever had the need to raise one side of your car, truck, RV or trailer a couple feet off the ground, the Titan Exhaust Air Jack is there to give you a lift. Quite simply, the jack is nothing more than a heavy-duty balloon inflated by the exhaust gas of your own vehicle. Once the deflated bag is placed under the vehicle, the Air Jack's inflation hose is connected to the vehicle's exhaust pipe. The engine is started and hot gasses are forced into the bag until the woven PVC-coated polyester bag lifts a vehicle a full 30 inches off the ground, which is plenty of height to get the wheels off the ground for most vehicles. With prices starting around $120, the device offers several advantages over traditional jacks. First, it can be used on soft surfaces (mud, sand, or snow) where other jacks just don't work. Second, it easily lifts one whole side of the vehicle at once, saving tons of time. Best of all, the low pressure bag doesn't require placement on normal jacking points so you more freedom to lift where you want and then place jack stands exactly where you need them. The military and emergency services have apparently been using jacks of this type for years, so the idea isn't just full of hot air.