SKU: 407601 Wig Libella - Hultafors Made of ABS plastic, making the wedge both light and durable. The angle of inclination is measured in millimeters per meter and the wedge has 20 steps between 2 and 40 mm / m. Can easily be attached to the rail of the spirit level with a strong steel wing nut. With a wedge between the rail of the spirit level and your Libella 2000 you can check slopes / incline angles.Read more