To inflate simply hook up to car exhaust and let the bag do the rest. An Ideal solution to rough terrain typically encountered in off-road conditions. This is the best solution if a conventional trolley jack or farmers jack cannot be used safely due to mud & rain. Capacity: 4 ton One way 6 m hose air hose with exhaust connector Comes with storage bag and soft material for protection under vehicle In the case of engine failure, the bag can be inflated with a 12V tire pump too.
 
Capacity - 4 ton