Must have item if you are installing an older (used) Majestic fireplace. This flue is a unique size and design.
Pros:Appears to be a quality product for fit and finish. The installer had no complaints.
Cons:The packaging seemed fine. Upon opening it appears one section of pipe was dropped on the corner of the box and bent the pipe slightly. I was able to straighten it back so it would fit together with another section of pipe.
You may want to consider stronger reinforced boxes, this happened on 1 of 3 total boxes I received.