The product is based on high quality low carbon steel, sintered spherical bronze layer in the middle and rolled polytetrafluoroethylene and lead mixture on the surface. It has good self-lubrication, wear resistance, low friction coefficient, good running performance, low noise and other properties, products are widely used in a variety of mechanical sliding parts, such as textile machines, printing presses, hydraulic trucks. Tobacco machine, fitness machine, agricultural machinery, etc.