This is a fan duct to better guide the flow of cool air towards the nozzle during extrusion.
It is specifically designed for the Arduino Materia 101 printer (or Sharebot Kiwi from which it derives).
I suggest printing it in 0.2mm layers.
I printed mine in white PLA, 220°C for the first layer, 210°C for the following layers.
The assembly requires:
- 4x 6mm 3M bolts (2 to attach the assembly to the metal carriage, 2 to join the plastic parts together)
- 4x 10mm 3M bolts (to fix the fan on the duct)