Filter Holder (4 x 1")
This is a simple holder for 2.54mm (=1inch) optical filters or lenses. The optical piece shall not be thicker than 1mm or so.
An example for a filter is included, but this is just for fit check, it is not a useful piece.
The retainer is keeps the optical piece in place. Print as many as you need.
In case you have a small printer, then use "Holder-A" and "Holder-B" and "Pin" and assemble the full filter holder afterwards. The fit migth be rather tight.