Granite Surface Plate Pink No Ledge Grade B Toolroom Surface Size (In.) 24 x 36 Surface Size (mm) 600 x 900 Thickness (In.) 6 Thickness (mm) 150 Flatness Unilateral Tolerance (In.) 0.000400 Flatness Unilateral Tolerance (mm) 0.0102 Weight (Lbs.) 495 Weight (Kilograms.) 225