Sunex Tools 20 Ton Capacity Air Bottle Jack is designed for operating either manually or pneumatically - Air hose can swivel in any direction - Fitted with safety valve to prevent overloading - Two piece handle allows for easy pumping - Extension screw gives added height when necessary - Minimum air pressure required is 90 PSI, 7 Bars - Double spring return Specifications: - Capacity (Tons) 20 - Power Lift (In.) 7 - Closed Height (In.) 10.5 - Raised Height (In.) 20.1 - Add. Screw Adj. (In.) 3.5 - Base Dimensions (In.) 6.5 x 8.9