It's a BentoBox v2.0 fan duct for Creality K1, inspired from this model https://www.printables.com/fr/model/641340-bento-box-v2-fan-duct-for-creality-k1

The goal is to mount the fan duct on the side instead of the back to improve the air flow inside the case.

Two longer screws BHCS are required (M4x10 or M4x12) to attach the model to the lower frame.

If the BentoBox is too close of the bed, you can use washers below the model.

I have connected the fans directly to the PSU. The BentoSwitch is optional.

You can find more information about the BentoBox v2.0 here :
https://makerworld.com/en/models/12786

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