Heavy-duty canvas cooler. Keeps heated air in during the winter months. It helps to prevent rust and corrosion on cooler and cooler parts. Prolongs evaporative cooler life. Water-repellant and mildew-resistant Rugged brass grommets for securing split cover. Heavy-duty sun-resistant cord. Downdrafts has one split corner for coolers with electrical disconnect boxes on the cooler exterior. All cooler covers are made larger in width, depth, and height to allow for shrinkage and minor cooler size variations. Order the cover that matches the size of your unit the closest. There is no need to oversize. Please Note: All Canvas Covers are custom-made and have a 1-2 week lead time! 40" DIAMETER X 33" HEIGHT Round Sidedraft Swamp Cooler and A/C Cover - DIAL #8556