18'x36' Oval Heavy Duty 15 Year cover. This winter pool is the least expensive 15 year cover around. We welcome you to compare prices. Silver top side and black underside. Cover comes complete with cable and winch for a snug fit. Cable runs through metal grommets that are spaced every 3 feet along the entire cover perimeter. Order pool cover by pool size. Each pool cover has 2 feet of additional material all the way around. Example: A 24' pool cover measures 28' across. 15 Year warranty with 3 year full rated.