Is this an acceptable pre-wired fan to use in an incubator?

[briz]

why would you worry about any of that as opposed to any other fan? your helix can do that also.

and those fans are way to big for his incubator, 24 cu ft is the smallest...

I think the fans would work, but chances are its overkill for what you need, like said above its not that big. I use 2x 30mm (basically 1 inch) fans in my cooler incubator, which is smaller than yours but works wonderfully.

your just trying to push air around to keep temps constant, there shouldn't much velocity.

I use a single 4" fan that is used to cool aquarium hoods. Used it for 3 years now without a problem. It is actually cheaper than a computer fan setup fron Radio Shack also.