Granite Surface Plate Pink 2-Ledge Grade A Inspection Surface Size (In.) 36 x 72 Surface Size (mm) 900 x 1800 Thickness (In.) 10 Thickness (mm) 250 Flatness Unilateral Tolerance (In.) 0.000600 Flatness Unilateral Tolerance (mm) 0.0152 Weight (Lbs.) 2475 Weight (Kilograms.) 1123