Hydraulic Cylinder Jack Solid 4/6 Stroke Single Acting Lift Jack Ram 10/20/50T On January 25, 2024 by admin 10/20/50T Hydraulic Cylinder Jack Solid 4″/6″ Stroke Single Acting Lift Jack Ram. 20 / 50 Tons Hydraulic Cylinder Jack, 4in / 6in (100mm/150mm) Stroke Single Acting Lifting Ram. This is a new 20Ton / 50Ton Hydraulic Cylinder Jack.