An extra robust aluminium level with highly transparent and durable unbreakable block vials. The horizontal luminous vial magnifies at +30%. Impact absorbing secure end guards. Sensitivity of 10mm/m and a tolerance in normal position of & plusmn 0.5 mm/m (inverted & plusmn 0.5 mm/m). The vial fluid is a low viscosity, coloured oil mixture that gives the bubble the best possible conditions for movement and is resistant to UV light and temperature fluctuations. The bubble is also not affected by static electricity as the fluid is anti-static. 1 x Hultafors PV 120 Professional Spirit Level 3 Vial 120cm