These files allow you to print a filter case for the Rendyr Optic laser so that you can create your own replacement filter. The actual filter components will need to be installed separately. There are 4 pieces to be printed and glued together: the main body, end cover, a bottom clip, and a grid to cover the charcoal filter. The body and cover require supports, but the other two parts do not. These should be printed with PETG.