Horizont spirit level with three spirit levels, accuracy 0.5 mm / m = 0.0285 °, anodized abrasion-resistant surface, wall thickness ALU profile 1.5 mm, liquid in spirit levels is UV stabilized and fluorescent, horizontal optical spirit level - facilitates and increases measurement accuracy, spirit level is resistant to operational shocks, 10 year warranty on spirit levels, EVERY PIECE ELECTRONICALLY TESTED. [***]