This holder allows to use 100mm filters like Lee, Haida or Cokin on the Olympus Zuiko 7-14mm f2.8 super wide angle lens.
Felt pads and 2 rubber bands (or 48*1.5mm o-rings) are needed to use the filter holder.
Please note: Shapeways delivers printed parts only. You will need felt pads and o-rings to turn this part into a working filter holder.
See
https://helge-suess.com/hardware-en/zuiko-mft-7-14mm-f2-8-filter-holder/ for more information.