*characteristics of the metal, * cheap and beautiful, *excellent, practical packaging materials Specification:30mm-250mm,applicable to protection of certificate,photos,documents and office supplies,and for photocopyingItemUnitSpectestThickness tolerance%≤3GB/T 6672-2001Transmittance%≥89GB/T 2410-2008HazeMPa≤3.5GB/T 2410-2008Tensile strengthMD%≥170GB/T 1040.3TD ≥170GB/T 1040.3ElongationMD%≥90GB/T ...