Mu, is the Greek letter, that is used in math. It is mostly used in math to represent the coefficient of friction. The Mu symbol is really nice, and it was created in Blender 3D. I created this symbol because I love the Greek alphabet. I think the best materials, for this model are all the metals, and really amazing ones are the polished metal. I made Alumide material available for this model, because this model looks good with Alumide too, and it is cheaper. This model has two holes where a string can be attached , and wear it. If you have any questions for this model, be sure to leave me a comment or contact me. :)