... Material: paper,aluminium,steel,plastic 1) Chemical ingredients: According with the rules of GB /T3190 2) Physical property:The physical ... property testing of basis material under roomTemperature accords with the rules of GB /T8544-1997 3) Appearance quality: ... 4) Surface:No crack, selvedge, canker, hole PRODUCT DESCRIPTION Aluminum Roofing Sheet Alloy 1050,1060,1070,1100,1145,1235 O,H12 ...