Faithfull box section spirit levels are manufactured from 1.5mm thick aluminium box section, fitted with 3 solid vials; 2 plumb and 1 horizontal with a measurement accuracy of ±0.5mm per metre and guaranteed against vial leakage for five years. Other features include impact resistant end caps and a resilient powder coated finish making them lightweight, strong and easy to keep clean. They are ideal for both DIY and professional use.