The Hultafors IV 40 Magnetic Spirit Level made for installation applications. Its robust aluminium profile is fitted with strong neodymium magnets. This along with the V-shape of the profile allows for a strong hold on pipes and other metal surfaces.

A center point scale on top of the profile allows for quick measurement and layout in different applications. Two vials for horizontal and vertical measurement. The block vial has additional rings for 2% inclination indication when measuring horizontally. Liquid in the vial is a low viscosity coloured oil mixture giving the bubble optimal freedom of movement.

Tolerance in normal position is ±0.5 mm/m, upside down ±0.75 mm/m.