Fan cover 40mm

Fan cover for 40mm which is fastened with two bolts like MK8 extruders. Cover snaps on the empty bolt holes. Lots of negative surface to ensure the free air flow and low noise level.

The cover is possible to print with out the support with 20mm/s. Cooling in the picture is sufficient http://www.thingiverse.com/thing:2084648 even that curved bridging is a bit challenging :-)