The key element of the spring suspension, designed for the repair and maintenance of freight wagons. It is designed for a standard trolley load capacity of 25 tons. Manufactured in accordance with industry standards. It provides reliable damping of dynamic loads, protects the structure of the carriage, guarantees smooth running, stability and safety of movement. A reliable solution for restoring the normal suspension characteristics, extending the service life of components and carrying out scheduled maintenance of railway rolling stock.