This is an air filter designed for the Neato D75 (Might fit other models). The design comes in 2 parts which clip together, the idea is that you simply sandwich a couple of sheets of toilet paper between the 2 halves to act as the filter. Been using this for a short while now and it fits and works perfectly!
Hope you find it useful!
Originally printed in PLA on an Anet A6.
A small number of supports recommended.
Here I'll be posting stuff I design and make, hopefully others will find my makings useful too :)