Low noise - E3D 40mm extruder cooler, with 2 x 40mm print cooler
thingiverse
A redux of the cooler that came with my kossel XL, the 30 mm fan that comes with the E3d transparent purple attachment to the extruder cooler, is very whiny and noisy, I couldn't take it any more so just changed this out for a 40mm fan and its much quieter, and I can leave the printer on without getting annoyed. :-) Used hot glue to attach the fans, they are all 40mm , clearances are fine for deltas. Printed this with PETG and supports.
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