I-Beam Level Number of 30 Vials 0 Number of 45 Vials 0 Number of Level Vials 1 Number of Plumb Vials 2 Top Read No Top Read Window Vial Illumination None Vial Material Acrylic Vial Shape Block Features Magnified Center Vial Shock Resistant Matte Finish Number of V-Grooves 0 Magnet Type Rare Earth Number of Magnets 4 Accuracy - Standard 0.0005 in/in Frame Material Aluminum Overall Height 1 1/4 in Overall Length 24 in Overall Width 2 3/4 in Magnetic Magnetic