Granite Inserted Angle Plate Pink 4-Face Grade A Inspection Surface Size (In.) 4 x 4 Surface Size (mm) 100 x 100 Thickness (In.) 4 Thickness (mm) 100 Flatness Unilateral Tolerance (In.) 0.0012 Flatness Unilateral Tolerance (mm) 150 Weight (Lbs.) 8 Weight (Kilograms.) 4