90 degree fan duct

Compatible with  - Prusa i3 Mk3s Bear Upgrade by 3DPrintronics.

We use this duct in our bear upgrade 3d printers where the hotend block is mounted in such a way that the heater and thermistor wires exit straight from the back of the carriage. 

Please see images of the mounted hotend and fan duct.

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90 degree fan duct