Product review (5 stars): Exact fit when the big box stores failed
Exact replacement for the vents installed on the exterior of my house which needed to be replaced due to UV damage.  It was hard to find this product at my local big-box stores, so it was a little difficult to confirm this was what was needed.  While I only needed the white louvered portion, the price was so affordable the aluminum tubes were not a big deal to recycle.