Can be either dual extruded or single extruded. I did not make this design and do not own the rights to it.For Single extrusion: Use the "Final FMA Keychain" STL file. For Dual extrusion: Use the separate "BASE" and "LOGO" files. When you add them to the build platform do not click "move to platform" at that will lay the logo inside the base. Import both and then select both and move to center. Then change colors accordingly.