16", 24" levels feature with lightweight strong box beam frame design with smooth sides , 9" handy light metal casing in an especially slim form - extremely sturdy , 9" Spirit level features with milled measuring surface and 3 pieces of strong button magnet , Easy-to-read high-visibility green bubbles which are clear and intuitive at 1 vertical vial, 1 horizontal vial and 45 degree vial , NOTE: 9inch(Magnetic), 16inch(Non-magnetic), 24inch(Non-magnetic)