Series 106 T - 3-chamber aluminium rectangular profile with reinforcing ribs. Patented construction form - Extremely long, extendible spirit level - Strong eccentric clamps ensure a high level of measuring accuracy (see table) - Alternatively equipped with slip-on spacers for working in wood construction or with rare-earth magnets for working in steel construction - Two measuring surfaces - 10 years warranty Accuracy in normal position / 0.029° = 0.5 mm/m / 0.057° = 1.0 mm/m (extended) Accuracy in reverse position / 0.043° = 0.75 mm/m Measuring surfaces / 2 x Vial type / 1 x horizontal / 2 x vertical End caps / Standard Special features / Telescopic system, Small plates with spacers, metric scale Length / 122 cm