Product name:String action Gauge Product size about : 10.3*5.2/2.05*4.05in Product color: As shown in the figure Product material steel product features: Top Quality: 1mm Thickness, Etched, High Precision Graduations, Luthier Tools Heavy Duty Steel Body. 2. Smooth surface: Rejecting any jagged edges, you will get a very flat and smooth flat edge. 3. Cleverly designed color: Beautiful black plating avoids specular reflections you don't want to encounter. White scale makes reading clear and easy to understand. 4. Ultra-thin: With a thickness of 1mm, you dont need easy-to-bend, paper-thin fret rockers. 5. Easy adjustment: Compared with similar products, the feel of the product is much improved, helping you not to be affected by the feel during the adjustment and measurement process. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 1 pc String action Gauge