Magnetic Aluminum 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: 72 in; Number of Vials: 5; Structure: I-Beam; Type: Builders Spirit Level; Vial Material: Plastic; Vial Positions: 2 Level, 3 Plumb; Weight: 4.60 lb.