Features Hydraulic telescopic cylinder COL are available with double stroke (D) or triple stroke (T). OPERATIONAL AREAS This type of cylinder can be used in various applications but the must popular one is in the railing sector and it’s used as a re-railing system. For this reason, the cylinders are made in light alloy which makes them easier to be transported. They also have a wider base which gives them a better stability and a integrated pilot check valve in order to control the lowerging of the load and for safety reasons in case a hose bursts. Together with supporting beams, roller carriages, adjustable connecting bars and traversal cylinders they constitute re-railing systems.