Anet A2 E3DV6 Cooling Fan Duct

I tried some coolers but wasn't getting good results. This one works well for me. If someone tries it and thinks another works better, I'd like to know. Always after good cooling. Attached is a picture of a functional impeller printed for my furnace blower. It's what made me make this cooler. The blades are pretty thin and would warp with the other coolers that I tried.

The nozzle is also visible and accessible.

Cooler fan is 40mm.
It fits around a 40mm hotend fan or the stock E3DV6 30m