... Stone Roofing MaterialOur roofing slate:CE,ISO9001,ASTM,BS680,EN12326Specification for Roofing Slate:such as Water Absorption Test, Sulphuric Acid ... many styles of buildings roof.We also offer customized service. Specification: 1.color: Black, Rusty, Gray and Green. 2.Standard ... natural surface, sweeped edge. 6.Package: Wooden crate suitable for long transportation. 2011 China Stone Roofing Material