Product review (5 stars): Item was as stated and was exactly like the one we replaced
Item was as stated and was exactly like the one we replaced.  We did discover that the previous owner or constructor of the house had to break away the plastic ring on the back of the vent in order for it to fit into the brick wall where it came out.  The builder made hole slighlty smaller than the diameter of the unit so it won't fit in correctly.  Not the manufaturer of the vents fault.