Standoffs for 1cm and 2cm blowers for quiet and better cooling of the Ardunio board of the Wanhao D6. I added the 1cm blower as it is quieter and directs the airflow better. They are attached with the middle screw on the side of the printer. I used a 12mm M4 as the original screw is rather short. I printed these in PETG. I leave the bottom plate off the printer