Product review (5 stars): Perfect for our 2nd home
Couldn't get this in the big box brick and mortar stores.  And believe me I tried to find one everywhere. Home Depot, Lowes, HHgregg, Sears, Sears outlet....and on and on. Perfect for our 2nd home. Installation a breeze.  Couldn't be more happier. The cut out for the flapper was easy and I got it lined up perfectly with my vent.  I got really excited when I heard the flap open and close...ha...ha