Danner 02475 Pro 5000 Skimmers Package Length-28 Package Depth-25 Package Width-25 Removes surface debris for ponds with a surface area up to 500 square feet Strong ribbed cylindrical housing eliminates cave-ins Made from heavy duty high density polyethylene Ribs anchor skimmer solidly in place, no shifting or heaving Large adjustable 11-Inch by 7-Inch weir door for maximum skimming with fish safe wings