Product review (2 stars): Vent Good, Pipe Not So Much
The plastic vent is fine, and I was glad to find one that was 3".  But the metal pipe is flimsy garbage.  I couldn't get the male end of my duct to fit into it, and as I was working on it, it sprung apart.  I just decided to cut a regular duct and glue it onto the plastic part.  If you can find just the plastic vent, I'd recommend that.