... weight, heat insulation 3.Installation is convenient color steel wall sheet 820mmthickness0.25~0.8(mm)Effective width760,820,840(mm ... resistant, green and environmentalUseRoofing, walls, workshop etc1 color steel wall sheet 820mm is excellent in the performance of waterproof.Edge of ... .5, it can be used in wall face of the office buildings, workshops, and large public color steel wall sheet 820mm