Features and Benefits: * Designed for operating either manually or pneumatically * Double spring return * Air hose can swivel in any direction * Extension screw gives added height when necessary * Minimum air pressure required is 90 PSI, 7 Bars Power lift: 5.1"; closed height: 9.9"; rasied height: 18.5"; add. screw adj.: 3.5"; base dimensions: 5.25" x 7.75".