Granite Inspection Surface Plate Material : Jinan Black Granite Flatness tolerance : Grade 000,Grade 00,Grade 0,Grade 1 Welcome to your enquiry for other specificationa.The largest size for production is 4000mm width and 100000mm length .We also accept to do relevant processing on the plate ,such as drilling ,glue T-slot ,dovetail slot ,etc.(According to the drawing ,estimate the product .)The " ...