These straight edges are lightweight and strong with black thermo-bonded gradations. All Swanson straight edges are made of high-grade aluminum alloy with high-visibility, thermally fused, yellow powder paint finish. Increased visibility translates to personal safety when using this straight edge as a cutting guide. Features: * High-grade aluminum alloy * Thermally fused yellow powder paint finish * Lightweight and strong * SAE measurements What"s In The Box: * Swanson AE144 72-Inch Straight Edge