The Hultafors Libella 2000 Spirit Level has a cast and smooth-finished aluminium housing. Its crush-proof block vials offer high transparency, durability, a magnifying lens and luminescent reflector. The liquid in the vial is a low viscosity coloured oil mixture giving the bubble optimal freedom of movement. Highly resistant to ultraviolet light and temperature fluctuations. The anti-static properties of the liquid means the bubble is not affected by static electricity. May be supplemented with Libella Spirit Level Rails, extensions and gradient wedges The radius of the vial is 1000 mm, giving a sensitivity of 2 mm/m. Tolerance in normal position is ±0.25 mm/m, upside down ±0.75 mm/m.