Genesis levels have an aluminum box frame with a red powder coat finish, shock absorbing end caps and are electronically calibrated to an accuracy of ?.029?. Has the Plumbsite? feature. This allows the plumb vial to be easily read from the front, rather than the side, through the use of a mirror mounted within the level. The solid acrylic vials of all levels are unconditionally guaranteed for life against losing accuracy, leaking or breaking. Economical levels with a single (bottom) milled leveling surface. Has a solid box frame (without hand holes) to allow use as a mortar screed. Levels are 3/4" wide x 2" high.