Structure: The cutting pure flexible graphite sheet is wound and molding pressed into ring-like packing. Features: (1) Fine self-lubricating. (2) High elasticity coefficient (3) 45 degree bevel cut is available to meet specific demand. Application: (1) Working temperature: -200癈 to 580癈(-200癈 to 800癈 in non-oxidative atmosphere) (2) Working pressure:=35MPa (3) Density: 1.4 to 1.6g/cm?