Metal gasket with inner and outer rings is composed of a basic metal gasket wrapped with metal strips and a steel-made inner and outer ring. The outer ring is used to enhance pressure and prevent loosening of the wrap. The outer ring is available in different materials. The metal gasket comes in four types: Basic Metal Wrapped Gasket (HOTA-600A), Metal Wrapped Gasket with Inner Ring (NOTA-600B), Metal Wrapped Gasket with Outer Ring (HOTA-600C), and Metal Wrapped Gasket with Inner and Outer Rings (KOTA-600D). Application Range: Sealing for pipelines, valves, pressure vessels, condensers, heat exchangers, towers, manholes, handholes, and other flange connections in industries such as oil, chemicals, metallurgy, power, shipping, and machinery.