78" TRUE BLUE I-BEAM-MAG #EM55.78 | Empire Level 500 I-Beam Level, Plumb Vial, 3-Vial, Acrylic Vial, 0.0005 in/in Accuracy, Magnetic/Nonmagnetic: Magnetic, Aluminum, 78 in L, 2-1/4 in W, 1 in H