This is a 51mm tamper. Its got a very nice flow to it especially if its printed with a fine resolution. I had it done for a friend hence the letters. I included the blank version for this download. You can modify it using SolidWorks.As I mentioned before I removed the innitials from the STL but they are still present in the CAD file so you can change them at will. I printed it with a raft and a fine resolution, and no warping on the tamper face. Its 51mm diam on the tamper face and 55mm tall all together. Its got a really nice flow to it.