Fan support 4 inch ducting

I made an enclosure for my Anet A6 and needed ventilation so I made a support to hold the fan and the 4-inch air duct.
The part fits the crimped end of the air duct, increase the radius of the duct support if you want to fit the other end which has a larger diameter. As you can see in the picture I tried to screw the duct into the part made from PLA. I should have added holes in the part. The position of the 2.5" fan mounting holes are too far, edit them before printing. I added a low-cost PMW