O-ring is abbreviated as O-ring, which is a rubber ring with a circular cross-section. O-ring is the most widely used seal in hydraulic and pneumatic sealing systems. The O-ring seal has good sealing performance, which can be used for static seals and reciprocating motion seals; not only can be used alone, but also a basic component of many combined sealing devices. It has a wide application range. If the material is selected properly, it can meet the requirements of various sports conditions. The working pressure can be from 1.333×105Pa vacuum to 400MPa high pressure; the temperature range can be from -60°C to 200°C.