Wide Mouth Fan Duct for Ultimaker
thingiverse
Improve your air circulation with this fan duct, suitable for V2 Nozzle. Clearance is 3mm to platform and 2.5mm to heater block. It may also be suitable for dual extruders, although it hasn't been tested yet. Choose between push-on or nut-mounted varieties. The design has been updated on May 16, 2013, with improved wall thickness and a firmer fit for the push-on duct. For better results, print it in PLA90 or ABS, especially if you have a heated bed. Be cautious when cleaning strings around the cable guide, as it's quite delicate. The zip file includes the UM model from http://www.thingiverse.com/thing:29513, along with the fan duct.
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