We noticed that the flat topped originals often sag in the middle, so we added a very low crown to the flat surface. It provides for better shedding of rain.
Please note that replacement covers are available from other sources, but they are usually made from acrylic, which does not have the durability of Lexan, or from a poorly done fiberglass which is not as attractive.
NOTE: This is a cover only. No hardware is included.
LIFETIME WARRANTY AGAINST BREAKAGE