Flexible graphite roll (sheet) material is based on the natural flake graphite as raw materials by a specific chemical treatment, high temperature instantaneous expansion by rolling, which is manufacturing graphite composite board, strip of graphite, graphite packing, graphite gasket, sealing, etc. the basis of pieces of material. Also can be used directly observe low occasion flange holes, water tables, and other parts of the sealed cover. High temperature resistance, corrosion resistance, radiation resistant, self-lubricating, non-permeability and the advantages of the wizard.