Product review (5 stars): good quality product
I only bought 1 when I need at least two. it seems like good quality and its a better product than what I can find at any of the big box stores. I refuse to buy cheap plastic parts for an exterior vent. In the future I'll buy more since I believe it will meet my needs in creating a port for a bathroom vent install. Side note: Who builds a house without vents?! Apparently the people who made my house.