Libella 2000 has a cast and smooth-finished aluminium housing. Crush-proof block vials with very high transparency, durability, a magnifying lens and luminescent reflector. The liquid in the vial is a low viscosity colored oil mixture that gives the bubble optimal freedom of movement. Highly resistant to ultraviolet light and temperature fluctuations. The anti-static properties of the liquid means that the bubble is not affected by static electricity.