4 Blade, Interchangeable Hub, Condenser (Pressure) Type Fan BladeBlades: 4Rotation: ClockwiseDiameter: 20 InchesPitch: 33°0 Inches Static Pressure: CFM = 4350, BHP = 0.3530 Inches Static Pressure: CFM = 3270, BHP = 0.41Maximum RPM: 1140Typical Applications: Air-Conditioning Condensers, Power Roof Ventilators, Heat Pumps, Heat Exchangers, Unit Heaters, Industrial Equipment