Derale 16910 10" Dyno-Cool High Performance Electric Fan

It is a fan and it works fine. I can't say for sure that it moves the claimed CFM, but it does move the air at a good rate and seems to be doing a fine job cooling my engine. I will say that the blades flatten out the farther you get from the center. I think that is so that an even amount of air is moved at all distances. But, it seems like a waste to me since you should make use of the higher velocity at the ends of the blades rather then throw it away by flattening them. They are plastic, so if you want to, you could probably heat them up with a torch and bend them a bit more. This review was written in June of 2014. I will update it if this fan breaks. That way whenever you read the review, you know how long the fan has been working.