... ,ASTM,BS680,EN12326 2.Roofing:Good,durable 3.Roofing Wuhan Building Material Roofing DecorationOur roofing slate:CE,ISO9001,ASTM,BS680,EN12326Specification ... : square, rectangle, U type and scale etc. . 4.Thickness (mm): 5-8, 6-9, 7-10,11-15,15-18 ... 5.Finish: natural surface, sweeped edge. 6.Package: Wooden crate suitable for long transportation. Wuhan Building Material Roof Decoration ...