High quality, Aluminium box section levels with three permanently fixed, shock resistant, acrylic UV resistant vials, one horizontal vial, one vertical and one 45° vials, one with side view vial feature. Precision milled top and bottom. Levels are electrostatically epoxy powder coated and baked for maximum protection. Fitted with shock absorbing end caps. Accuracy of 0.5mm per 1M = 0.029° in standard position.