The piston ring is a metal elastic ring with a large outward expansion deformation, which is assembled in an annular groove corresponding to its cross section. The piston ring forms a seal between its outer circumferential surface and the cylinder wall, and between one side of the ring and the ring groove through the pressure difference of gas or liquid. The main functions of the piston ring include sealing, regulating the oil volume (oil control), conducting heat (heat transfer) and guiding (support). The product is characterized by a super-hard wear-resistant particle coating with a low wear rate and significantly improved wear performance. The special coating structure and excellent anti-scratch performance optimize the wear resistance of the cylinder bore. Piston rings are widely used in various power machinery, such as steam engines, diesel engines, gasoline engines, compressors and hydraulic machinery. Usually, the piston ring is installed in the ring groove of the piston, and together with the piston, cylinder liner, cylinder head and other components, it forms a working chamber. The product comes with a one-year warranty to ensure that it meets customers' strict requirements for quality and performance.