1 - Download the STL file
2 - 3D print it as is with standard medium or fine settings
3 - Cut two small pieces of sponge and place them into the filter case
4 - Close the case with the lid and two standard 3 mm screws
5 - Unload the filament from your Replicator 1, 2 or 2X
6 - Remove the filament guide tube
7 - Insert the loose end of the filament into the adapter.
8 - Make sure that it passes through the sponge and slides smoothly
9 - Insert the adapter into the Replicator's extruder hole
10 - Insert the filament guide tube into the top part of the adapter
11 - Enjoy hours and hours of dust-free 3D print extrusion
Check this Youtube video for more information: http://www.youtube.com/watch?v=CUG2MQkVAU0
Every now and then open the adapter and check the sponge for dust. Replace if necessary.
In some cases filament can jam or cause uneven 3D prints if the friction in the extruder's filament tube is too high. This adapter can also be used to lubricate the filament just before it enters the extruder.