Features:Wide application: suitable for high pressure fuel system, brake caliper hollow, brake master cylinder, turbocharger fuel lines and water pipes, automotive replacement of drain plug gaskets.High quality material: made of high quality aluminum alloy material, wear resistance, corrosion resistance, not easy to rust and break, can be used for a long time, durable.Features: Low and high pressure sealing is reliable, high and low temperature performance is good, reduce the tightening load without loss.Usage: Adhesive gaskets are widely used for sealing under the head in high pressure applications, and copper gaskets are not suitable. They are commonly used in hydraulic and pneumatic connections under high pressure.Easy to use: Gasket installation is simple, quick and effortless.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Material:Aluminium AlloyInner Diameter:12mmOuter Diameter:20.8