Rectangular aluminium profile with reinforcing ribs for high stability and safe grip when working. Two vertical spirit levels enable quick reading in any position. Integrated slip stoppers ensure a firm fit when marking out, preventing the spirit level from slipping. Stabila quality vials provide optimum readability with highly transparent, resistant acrylic glass featuring precisely ground inner contours and fluorescent vial liquid. Stabila installation technology ensures long-term precision, with measuring accuracy in normal position of ± 0.5 mm/m and in folding position of ± 0.75 mm/m. The spirit level has two measuring surfaces for precise measurement in all positions. Coated measuring surfaces protect sensitive surfaces, while plastic end caps safeguard the profile from knocks. It is easy to clean thanks to electrostatic powder coating. Features include one horizontal bubble, two vertical bubbles, and two coated measuring surfaces.