I replaced the roller blinds and blackout curtains on each window with these curtains. They fit perfectly, each window took about 5 minutes and that's because I measured the hangers where I wanted them on the inside of the window. Once hung, they dropped easily, stayed put and were easy to pick up again. I think they are as black as the curtains, if not more because they fit the window frame. As for longevity, I don't know yet, they only have a few days. I ordered another set for my wife's office.
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