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Enclosure exhaust fan mounting bracket For 80mm PC fan and 4 inch flexible duct hose.

It works with 

80mm PC case fan

4 inch flexible duct hose for laundry dryer

½ inch thick insulator board or your enclosure wall thickness should be less than ½ inch

You need 6/32 1-½ machine screw or 8/32 1-½ machine screw and zip ties.

You need to cut 105mm circle hole to your enclosure.

I printed with ABS 20% infill 5% support

When you purchase 80mm PC fan, get a powerful model. Mine was 12V 0.16A but it was not powerful enough.