WTF is this thing?

[NeatSquidYT]

Hi,

I found this in a box. Any ideas what it is?

[DoubleUx2]

I think these are called fans ... ...

[Samfisher]

Looks like the fan assembly of a blade server chassis.

[Bsmith]

a cooler with integrated filter?

if the piece on the fans is made of metal it could be used as a heatsink

[Mentalguy]

looks like it clips into a 5 1/4 drive bay of a case for added airlow

[C0LL0SS0S]

do they turn around ? If so those are most likely fans that look like they could be used for air that is going outside since rain isn't gonna get in

[Tedster]

Looks like a fan panel.

[thekeemo]

hard drive cooler?

[ThomasD]

looks like it clips into a 5 1/4 drive bay of a case for added airlow

Yep, those are 60mm fans and it fills two 5.25" bays.