Manual hydraulic pump consists of ZG3/8 connector, hydraulic pump body, anti-slip handle, oil return switch and oil hose. The surface of hydraulic cylinder jack and hand pump is smooth, with good sealing and no oil leakage. The whole is made of heavy-duty metal structure, which is durable. It has various functions such as lifting, jacking, shoveling and splitting, and can be quickly installed by quick coupling. A variety of tonnages and strokes to choose from, according to your needs you can also be used with your own. Compared with ordinary jacks, multi-section jacks can be used in narrower and lower spaces, effectively increasing the stroke of the jack within the height of the body, which can be lifted higher and more convenient to use. The tonnage is sufficient, the stroke is sufficient, will not be stuck or burst cylinders. Vertical, horizontal and inverted orientations are available. Can be used in narrow spaces. All cylinders need to be used on firm and flat surfaces, not on soft or rough surfaces. Please note that incorrect use will likely damage the jack or cause serious safety accidents. Widely used in construction sites, petroleum, electric power, metallurgy, chemical industry, ships, bridges, steel and other industries for the installation and maintenance of large and medium-sized machinery and equipment. Not suitable for car. Quality assurance, each tool has gone through multiple checks. Within one year of purchase, if there are any questions, please feel free to contact us. Please purchase with confidence. This hydraulic jack cylinder is a great helper for riggers, fabricators, welders, and frame shops in electric power, chemical industry, steel, Bridges, machinery, and other industries.