The Stabila R-Type Levels have been developed for the toughest building site conditions. They are extremely robust, with an innovative 5 chamber aluminium R-profile with torsion rigidity. In addition, the levels have removable and shock-resistant end cap with patented Stabila non-slip stoppers.The levels have an extra wide measuring surface (4cm), making them extremely stable and ensuring they do not tip over during measuring. Three clearly guided marking edges, along with a web over the horizontal vial, allow marking or cutting over the full profile length.The R-shape of the profile provides a comfortable grip, acting as a finger groove over the full length. This allows perfect handling during measuring and transport.Measurement Accuracy:In normal position: 0.029° = 0.5mm/m.Overhead Measurement: 0.029° = 0.5mm/m.Stabila R-Type Level.Length: 81cm (32in).