These skylight covers are cheap, poorly made, and if they don't fit properly, you're stuck for the cost, which is highly inflated. The covers I received didn't fit. They were not double stitched where the cheap bungee cords were installed, and the stiches were already coming out.The skylight material was paper thin. This is probably a backyard garage operation and I recommend you avoid this company. I subsequently made my on covers using a strong tarp, all weather duct tape, and Flex-seal.