Silicone O-Rings，Different from a gasket, O-rings in metric sizes have round edges and are molded to fit a specific profile. They are commonly used for higher pressure and hydraulic applications and are the most common seals used in machine design because they are inexpensive and reliable.

Common metric O-rings are used for sealing applications including valves, engine components, hydraulics, faucets, pipe joints, flanges and more. They are manufactured using various types of elastomers and durometer options to meet a range of sealing requirements.Silicone O-Rings