This adapter is meant for SPS30 particular matter sensor. It allow to use it with SDS011 mount holes. Of course - device has to support SPS30 since it has different protocol than SDS011.
First version - it will require modifications. Current design does not cover all SPS30 inlet areas, so it is not workable solution for adding inlet to SPS30. It allows mounting SPS30 in place for SDS011.
The author marked this model as their own original creation.