40mm-Fan 45° Bow
thingiverse
The 45-degree duct-bow is designed for 40mm fans; however, it does not fit with the following combination of items: fan duct/nozzle (thing:160252), 40 to 80mm adapter (thing:21112), and an 80mm fan on a Velleman K8200 printer. Instead, opt for the 90-degree bow as a suitable alternative.
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