Laser cutter nozzle extension

I saw that another member had submitted a similar nozzle extension for his Ebay 50W laser. I wanted to make sure it fitted my laser nozzle so I redrew it and it works fine. I have included the stl file and the gcode for my i3 pro b 3D printer. I made it from PLA. It printed with minimal cleaning up but I did take a little off the end of the nozzle in the final setup to get the focus height correct without hitting the laser bed.