Ksport racing pneumatic air jack is a must have for any serious racer looking to decrease pit time at the track. The unit is made from quality aluminum and weighs only 5lbs. each.High quality forged fittings make sure there is an air tight seal when your line is connectedEach airjack can support up to 550kg (1210 lb) load. Use that information to figure out how many air jacks you will need for your application.