Leitz 70440089, 17.7 x 17.7" (450 x 450 mm), Glass, Fixed, Magnetic, Anti-scratch coating Leitz 70440089. Working area: 17.7 x 17.7" (450 x 450 mm), Installation type: Fixed, Surface material: Glass. Width: 17.7" (450 mm), Depth: 17.7" (450 mm), Height: 1.57" (40 mm)