3 Blade, Interchangeable Hub, Condenser (Pressure) Type Fan BladeBlades: 3Rotation: ClockwiseDiameter: 20 InchesPitch: 31°0 Inches Static Pressure: CFM = 3870, BHP = 0.2430 Inches Static Pressure: CFM = 2680, BHP = 0.30Maximum RPM: 1140Typical Applications: Air-Conditioning Condensers, Power Roof Ventilators, Heat Pumps, Heat Exchangers, Unit Heaters, Commercial and Industrial Equipment.