Laser dust cap
thingiverse
You may find this laser dust cap useful as an extra precaution. Its design accommodates the 21mm adjustable lens that I received with my laser device. However, I discovered that it fits quite tightly for my needs, so you might want to adjust its diameter slightly or smooth out the interior surface by sanding.
Download Model from thingiverse
With this file you will be able to print Laser dust cap with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Laser dust cap.