Aluminum rectangular profile with reinforcement ribs ? High stability and a secure grip when working, integrated slip stoppers ensure a firm seat when marking, no slipping of the spirit level, STABILA built-in technology ensures long-term precision, measuring accuracy in the normal position ± 0.5 mmm, in the reverse position ± 0.75 mmm, quality bubbles for Optimum readability, highly transparent, durable acrylic glass with precisely ground inner contours and fluorescent spirit level, spirit level with two measuring surfaces, precise measurement in all positions, coated measuring surfaces protect sensitive surfaces, plastic end caps protect the profile from impacts, easy to clean thanks to the electrostatic powder coating particularly suitable for use in the areas of gardening and landscaping, reinforced concrete construction, carpentry work as well as carpentry and tiling work