Magnetic Unitek LevelSolid I-beam frame with magnetic edge. Top read window. Replaceable acrylic vials. Beveled end plates protect from shock. High visibility yellow. Base Type: Magnetic; Brand Name: Magnetic Unitek™; Length: 36 in; Number of Vials: 3; Structure: I-Beam; Type: Builders Spirit Level; Vial Material: Plastic; Vial Positions: 1 Level, 2 Plumb; Weight: 2 lb.