Made of lightweight aluminium. Measuring accuracy: 0.5 mm. 0.5 mm/m accuracy in normal position and 0.75 mm/m in overhead position. Features cylindrical vials. The spirit level liquid is resistant to UV light and extreme temperatures. Sensitivity: 10 mm/m. Easy to read. Radius of the vial: 200 mm. Unbreakable vials. Two lines per side of the vials for easy use. Aluminium profile with a wall thickness of 1.4 mm. Lightweight aluminium profile: 520 g/m.