... , easy operate, this machine need used together with air compressorAir Jack Specification1,Lift Weight:2500kgs2,Gasbag Diameter:250mm ... only warranty for air jack values, not including rod, air bag,wheels.Please Attention, warranty parts following: Air Jack AttentionThe wheels ... break becuase of above two reason.Air Jack wheels Air Jack Valves Air Jack Inside Air Jack Vaccum Valves Function--Vaccum ...