Granite Straight Edge Pink Grade A Inspection Surface Size (In.) 2 x 4 Surface Size (mm) 50 x 100 Thickness (In.) 24 Thickness (mm) 600 Flatness Unilateral Tolerance (In.) 0.0012 Flatness Unilateral Tolerance (mm) 150 Weight (Lbs.) 22 Weight (Kilograms.) 10