Granite Surface Plate Pink No Ledge Grade A Inspection Surface Size (In.) 48 x 72 Surface Size (mm) 1200 x 1800 Thickness (In.) 10 Thickness (mm) 250 Flatness Unilateral Tolerance (In.) 0.000700 Flatness Unilateral Tolerance (mm) 0.0177 Weight (Lbs.) 3300 Weight (Kilograms.) 1497