18' Round Black Supreme Plus Above Ground Swimming Pool Winter Cover 15 Year ... Double grommets every 2' ft -Includes cable and winch -Ultraviolet light inhibitor Color: Black Top / Green Underside -Pool Size: 18' ft Round / Cover Size: 22' ft Round- Warranty - 15 Years (5 years full) Triple laminated polyethylene -Double Stitched and triple thick hems using UV resistant nylon threads 4' ft overlap -12x12 Scrim per Square Inch