An absolute essential in any toolbox, workshop or household, the Silverline 450mm Spirit Level is made from 1.1mm thick extruded aluminium. It features a milled V-groove bottom face for accuracy and pipework applications as well as ribbed sides, protective end caps and a convenient hanging hole. The 45°, 90° and 180° vials are highly visible and UV-resistant. Accurate to 1mm/m.