NELA Black Edition Spirit Level – with Life Time vial warranty, Accuracy <0.5 mm/m, Reverse Accuracy <0.5 mm/m, 2 Electronically calibrated vials, Strongest Profile with built in bridge, Dual View vertical vial, Finely milled levelling surface (up to 120 cm), Rubber Anti Shock End Caps, Wall Grip Measuring Feature, Continues Marking (due to the bridge) Ergonomic Rubber non slip Handles, 1% and 2% Gradient levelling.