Straight-edge Hultafors MST is strongest and most sensitive spirit level.

Crush-proof block vials that is UV-resistant and withstands temperature changes with a +30% magnification lens and luminescent reflector for easier reading. Made from strong aluminum profile measuring 100x25 MM weighing 1180 G/M that is easy to clean and equipped with ergonomic handles. The radius of the vial is 2000 MM, giving a sensitivity of 1 MM/M. Tolerance in normal position is ±0.3 MM/M. Slots in the Aluminum profile makes it possible to fasten the level against the wall for easier mounting of example cabinets. The liquid in the vial is highly resistant to ultraviolet light and temperature fluctuations and gives the bubble optimal freedom of movement. 

The anti-static properties of the liquid means that the bubble is not affected by static electricity.