Product name:Guitar Radius Product size about : adius Dimensions: 200mm * 75mm * 30mm. (7.9 x 2.9 x 1.2 inches) Matte paper (600 grit): 196mm * 70mm(7.7 x 2.75 inches) Sanding Block Weight: 300g/10.58 oz Product color: As shown in the figure Product material:Maplaple product features: 1. Two-Way fingerboard sanding block for the sanding frets and leveling fingerboards. There are two different radiuses on each block. 2. Innovation design, each sanding block can math 2 radius. 2 fret board radius used in guitar & bass building and repair: 7.25"&15", 10"&17", 10"&14", 9.5"&20", 12"&16". 3. Material: maple. High glossiness, solid and long-lasting use, not easy to deform. Groove side design gives you comfortable grip. 4. Dimensions: 200mm * 75mm * 30mm. (7.9 x 2.9 x 1.2 inches). Convenient Luthier sanding block. 5. Note: Sandpaper included(600 grit). Different guitars need different arc grinding blocks, please confirm the size of your Guitar or Bass before you purchase. 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 contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 1 set Guitar Radius