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Our roofing slates are directly from our own quarrys and processed by ourselves,so we can guarantee the quality highest, price most competitive and supplying in time.Slate Of China roofing slate has formally passed the series of tests of the Standard BS**0(***1)"Specification for Roofing Slate",such as Water Absorption Test, Sulphuric Acid Immersion Test, Wetting and Drying Test,and so on. Our roofing slates have been exported to Eruope and American market for many years and very popular in there.Please feel free to contact us at xxxxx necessary,we can send you a free sample.(you only pay the postage) The detailed information please visit our website: http://xxxxx