This 30' X 30' Valance top cover fits a 28' X 30' high peak, "A" shaped frame. Each side of the roof rafter or peak must be 15'3" long Heavy-duty 12 Mil thick polyethylene 6.0 oz. per square yrd 1200 denier 14x14 weave count Grommets approx. every 18 inches Replacement top for our 18' x 20' frames UV PROTECTION WATER RESISTENT