Duct that lets you mount a larger 120mm fan to a 40mm fan slot with a 90 degree corner turn so that you can get away form the 40mm fan slot to have space for the 120mm fan.

Get way better cooling with less noise using a larger fan than originally intended. Ideal for using passively-cooled server GPUs in normal computer cases.

OR cool your solar inverter way better than whatever small fan it had on before.

 

Please look at technical drawing for exact dimensions.

Comes with duct, 4 M5 self-tapping screws for the 120mm fan, and 4 M3 6mm bolts for the mount on 40mm side. All mounting holes are M4.