Milling bit fan

I needed a milling bit fan. I've seen this trick used in machine shops and on the the other machine to clear chips. However I could't find any designs or I was looking for the wrong thing. I ended up drawing one it works like expected the fitting can be improved if any one is up for the challenge.

It's made using Ultimaker 2 and took around 12 minutes to print with no infill.
Material: PLA