the surface of titanium foil is bright,no gap,no grease and grain.it can be used in electronic,astronauts,laser industry. The titanium foil's features:1.Trademark: GR1 GR22.Condition:M/Y3.Size :thickness*width* L /mm0.025-0.3×50-300×>5004. chemical composition FeCNHOAlVMoNiPdTiGR10.20.080.030.0150.18----------BAL. thick 0.3-0.35mm titanium foil for sound