Category C buffer which meets the requirements of the EN 15551 standard and the UIC leaflet, as well as the related leaflets, equipped with the OLEO Type 5 shock absorber. The buffer is characterized by of its infallibility and reliability during many years of operation. The buffer casing is manufactured in a unique process of hot extrusion. The buffers can be delivered with disks of the width of 450 with standard or increased hardness, as well as with a plastic cover plate. The buffer has good working parameters and operational reliability within the temperature range from -40°C to +50°C. The product has the EBA and TSI certificates.