Arctic Armor Mesh Rectangular Safety Cover for 20ft x 40ft In-Ground Pools with 12-Year Warranty Color: Blue (WS390BU) category: Home / Blue 12-Year Mesh Safety Cover For 20' x 40' Rect Pool Color: Blue Cover size: 22' x 42' Pool Size: 20' x 40' Shipping dimensions: 24 x 21 x 21