Product review (4 stars): Seems sturdy
I was tired of constantly replacing the cheap home center dryer vents every year or two so I purchased the HEARTLAND 21000 Dryer Vent Closure.  It  seems to be very well made.  It was easy enough to install on brick wall with additional anchors.  Directions recommend painting the closure to prevent UV ray degradation.  I used Krylon Spray for Plastic and it worked fine.  I would recommend painting before installation.