Item Surface Plate Material Granite Application Grade Inspection Color Pink Edge Style Flat Flatness 0.000100 in/0.0025 mm Grade A Length 12 in Surface Size 12 in x 12 in 300 mm x 300 mm Thickness 4 in Case Type Crate Flatness Unilateral Tolerance (In.) 0.000100 Flatness Unilateral Tolerance (mm) 0.0025 Includes Case No Standards ASME B89.3.7 2013 GGG-P-463c Surface Size (In.) 12 in x 12 in Surface Size (mm) 300 mm x 300 mm Weight (Kilograms.) 25 kg 12 in Weight (Lbs.) 55