I-Beam Level Number of 30 Vials 0 Number of 45 Vials 1 Number of Level Vials 1 Number of Plumb Vials 1 Top Read No Top Read Window Vial Illumination None Vial Material Acrylic Vial Shape Barrel Features Frame is Non-Conductive Will Not Scratch Fine Wood Or Painted Surfaces Durable Easy-Read Vials Impact Resistant Number of V-Grooves 0 Magnet Type Not Applicable Number of Magnets 0 Accuracy - Standard +/-0.125 in Frame Material Plastic Overall Length 48 in Magnetic Nonmagnetic