4 Blade, Interchangeable Hub, Condenser (Pressure) Type Fan BladeBlades: 4Rotation: ClockwiseDiameter: 20 InchesPitch: 29°0 Inches Static Pressure: CFM = 3920, BHP = 0.2930 Inches Static Pressure: CFM = 2290, BHP = 0.35Maximum RPM: 1140Typical Applications: Air-Conditioning Condensers, Power Roof Ventilators, Heat Pumps, Heat Exchangers, Unit Heaters, Industrial Equipment