Johnson Level & Tool 3748 48-Inch Machined Top-Read Aluminum Level
Extruded aluminum I-beam with black anodized finish. Computer machined level edge. 360 degree reading acrylic yellow barrel vials. Screw-on, high-impact resistant plastic covers with protective lenses. Large, patented, magnified top-read window. Shock-protecting end caps.  Frame dimensions: 1 In. x 2-1/4 In.