We can do sizes: Minimum inner diameter 3mm - maximum outer diameter 4000mm Minimum thickness 0.5mm- maximum thickness 300mm All kinds of special size with Angle can also be produced Thousands Sizes Customizable please contact me for any sizes required Made from pure graphite. It has good corrosion resistance, high/low temperature resistance, good compression resilience and high strength, all kinds of round and complex geometric gaskets are widely used in pipelines, valves, pumps, pressure vessels, heat exchangers, condensers, generators, air compressors, exhaust pipes, chillers and so on. Specification: * Density: 1.6-2.0 g/cm3 * Compressibility (ASTM F36A): 30% * Recovery (ASTM F36A): >/= 10% * Pressure: 40bar * Temperature: -240~+550 ℃ * PH: 0~14