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 5 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.This comprehensive four piece level set contains the following 3 vial levels . 1 X 230mm Magnetic Scaffold Level (9in) 1 X 600mm Box Level (24in) 1 X 1200mm Box Level (47in) 1 X 1800mm Box Level (71in) 3 x Red Carpenters Pencils