The Curve design creates a maximum solar collecting area that captures FREE heat from the sun even as the position of the sun changes! The Curve is made from a super strong blow-molded plastic frame with a clear cover that locks in heat and deflects cooling winds. The Curve easily connects to in-ground or above ground pools. Works on above ground pools up to 30ft. round, multiple units may be needed for in ground pools. Includes 2 hoses and stainless steel hose clamps and fitting for index 2 1/4in. (40mm) hoses. Measures 43.3 x 27.2 x 5.5in.