Description： Air hydraulic bottle jack is ideal for lifting heavy-duty machinery, industrial construction equipment, farm vehicles, and more; Wide, rugged base adds stability and strength Features a lifting range between 10-7/16″ to 20-1/16″ with a 20 ton (40,000 lb) load capacity; Designed for operating either manually or pneumatically Automatic dual spring controlled lowering system; Fully polished and chromed cylinder rams enhanced with high-performance seals Has an air pressure range of 100 to 175 PSI; Push-button trigger control increases speed and efficiency, reducing lift time Fitted with safety valve to prevent overloading. .