Product review (4 stars): Good Quality Vent
I like this vent.  It is very sturdy.  The holes in the vent and the ones in the screen do not line up well and are different diameter.  I bought bolts to fit the screen and they would not fit the vent, so I had to go back and get smaller ones.  I struggled to make them line up, but eventually got it to work.  I think it caused the vent to be a little off because it does not close as well after being installed as it did before it was installed.  I am gong to work with it before stucco is put in around it.