Product review (4 stars): Quality Product
I bought the 4" cap for the bathroom from my local big box store, but they didn't carry the 6" version that I needed for my new range hood. I ended up buying the 6" no-name version they carried at the big box store. When I opened the Broan 4" roof cap, the quality between that one and the big box no-name 6" cap was night and day. The no-name big box cap was flimsy and very cheaply made. So I returned the 6" no-name roof cap and ordered the Broan-nutone 634M and I am happy with the product. It is made of much heaver gauge material and has a much nicer finish. Mine was not damaged in shipping.

The only downside is that the flange could probably be a bit wider. I would be much more comfortable if the flange of the cap came out another 2 or 3" in all directions. Since the flange is rather small there is not much shingle overlap and that makes me a little nervous about water being able to penetrate, causing a leak. It's only rained once and so far so good, but making the flashing a bit wider would give me a little more piece of mind.