Dryer 4 inch vent flap replacement

This flap is a direct replacement for a 4 inch Imperial dryer vent (VTL0014-A). I broke a flap as soon as I brought the vent home. I made a very thin flap to make sure the air can blow it open. Print it using a filament that offers a bit of flexibility as you will need to bend the flap in the middle to get the axles in the holes. Check the measurements in the photo.