Square hydraulic cylinder specification HC square hydraulic cylinder with compact design can save installation space. this series of square hydraulic cylinder is mainly used in metallurgy equipment and heavy machinery, and also suitable for other industries. HC square hydraulic cylinder tubes are made of carbon steel, after is honed the inside diameter tolerance level in the H7 ~ H9 with surface roughness of 0.3 ~ 0.6μm.oil seal and other seal products are imported with high precision, resistant to oil, rusty, friction, loss, and pressure.various parts are precision machining by milling and CNC lathe, good fit, high service life, easy to maintenance.