All the scale on the gauge are clear, sturdy and accurtae welding gauge Made by stainless steel, not easy to rust and not easy to bend The measurements of the gauge can be inches or millimeters General Linear Measurements up to 2 inch (50mm) Bridge cam welding gauge mg-8, weld gauge, welding gage 1. The material of the gauge is high strength stainless steel, then the ruler is not easy to bend and wear, never rust, and it also measurement. 2. Above measurements are possible in either inches or millimeters 3. weld inspection ruler with fastening screws can be fixed at any , then it is convenient for reading when you do the measurement 4. It Laser-engraving and chemical corrosion. lines legible,not easy to fade. 5. The rular surface is mechanical grinding, no glitches 6. The Linear measurement range of the gauge is between 0 to 50mm Measurements are possible in either inches or millimeters Depth of pitting Depth of undercut of preparation Fillet weld throat size Fillet weld length Excess weld metal (capping size) Misalignment (high-low) Color: silver Material: Stainless steel Size: 100x69mm, thickness: 1.35mm Package Contents: 1 x Welding Gauge 1 x Instruction book Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.