40*20 Gray Roofing slate 1.Manufacturer,Factory price. 2.Size ... several high quality slate quarries for processing.Chinese 40*20 Gray Roofing Slate1.Product info: MaterialslateShapesquare,rectangle, triangle, fishing scale ... 7,6-8,7-9mm;or customerizationColorRusty,Black, green, gray etc. PackageCrate MOQ100 M2TestPassed ASTM/EN12326/CE/BV/SGS ... know more about our products. Natural Chinese Gray Roofing