If it is possible, we would like to recommend you to order windows from us at our off season. You will have better prices as well as faster delivery, especially when the order is full container load.
We are very sorry to hear that Mr. and Mrs. Trump were tested positive of Covid-19 yesterday. We pray for him and his wife and hope they will get better very soon
Essentially it is an optional part of the aluminum windows frame, to cover the edge of the wall openings. The reason that this is an optional design is because not everyone needs it or likes it.