ò Designed for operating either manually or pneumatically.ò Air hose can swivel in any direction of connection from air source.ò Fitted with a safety valve against overloadingò Extension screw gives added height when necessary.ò Speedy and versatile, air/hydraulic bottle jack is far quicker than using conventional hand operated hydraulic equipment and much safer since air power permits one-handed operation and enables user to watch load more closely.ò Heavy duty design makes them ideal for a wide variety of automotive, truck, industrial and construction work.Specifications:Capacity: 20 TonMinimum Height: 7"/178mm Maximum Height: 12.75"/323mm Air Pressure: 90-120psiNet Weight: 24.75lbs./11.20kg