4 Blade, Interchangeable Hub, Condenser (Pressure) Type Fan BladeBlades: 4Rotation: CounterclockwiseDiameter: 20 InchesPitch: 26°0 Inches Static Pressure: CFM = 3540, BHP = 0.2430 Inches Static Pressure: CFM = 2580, BHP = 0.32Maximum RPM: 1725Typical Applications: Air-Conditioning Condensers, Power Roof Ventilators, Heat Pumps, Heat Exchangers, Unit Heaters, Industrial Equipment