20Ton, 50Ton Hydraulic Cylinder Jack 4/6Stroke Single Acting Telescopic Ram Jack On December 15, 2023 by admin This is a new 20Ton / 50Ton Hydraulic Cylinder Jack. 20 / 50 Tons Hydraulic Cylinder Jack, 4in / 6in(100mm/150mm) Stroke Single Acting Lifting Ram. In order to operate correctly, all oil cylinders need to be connected with solid and flat surfaces.