O-rings are one of the most common seals used in machine design because they are inexpensive, easy to make, reliable and have simple mounting requirements. Sealing rings are mainly used in the following industrial fields: hardware and plastics, water supply and drainage, HVAC, fire protection, pharmaceuticals, ships, and other piping systems, automobiles, motorcycles, various machinery, household appliances, electronics, toys, sports equipment, pneumatic components And bathroom industry.