Vinyl Tarp 9 oz. Heavy Duty Black / White Waterproof (20' x 24') 9 oz. per sq. yd. - 11 mil thickness 3-ply vinyl, 100% waterproof, UV protected, Anti-mildew, Tear-resistant Black on one side, white on the other, both sides are UV protected Does not come with grommets or pipe sleeves/channels Not certified/recommended for use with fish ponds