Ultra-rigid aluminium profile with reinforcing ribs – for high stability and secure hold while working. Two vertical vials for quick readings in any position. End caps with an anti-slip stopper – for a firm seat when marking. Shock-absorbing end caps – the two-component material mix protects the profile against impact. Removable end caps – exact positioning and marking right up into the corners. Easy to clean thanks to the electrostatic powder coating. Spirit level with two precision-milled measuring surfaces (coated from 183 cm). Accurate measuring in all positions. STABILA installation technology ensures long-term accuracy – measuring accuracy in normal position is ± 0.5 mm/m and ± 0.75 mm/m in reverse position. Equipment: 1 horizontal vial, 2 vertical vials, 2 measuring surfaces.