You're buying exactly what it looks like. An airbag design with basic valves that will lift light Vehicles very fast and and easier than hydraulic. Yes it almost lifted a DT466 farm truck front axle without blowing out the airbag and I was impressed but it's not rated for 10 tons now is it. Will very easily lift 3 or 4 tons on a small compressor. Unsure about longevity of the rubber obviously but quality appears that it could easily last 10 years and is Affordable. The amount of lift without rejacking that it's capable of is the best feature