Bore Size: Interchangeable Hub Diameter: 20.000" Blades: 2 Pitch: less than 25 degrees 2 Blade, Interchangeable Hub, Condenser (Pressure) Type Fan BladeBlades: 2Rotation: CounterclockwiseDiameter: 20 InchesPitch: 25 degrees 0 Inches Static Pressure: CFM = 3000, BHP = 0.1030 Inches Static Pressure: CFM = 1320, BHP = 0.15Maximum RPM: 1725Typical Applications: Air-Conditioning Condensers, Power Roof Ventilators, Heat Pumps, Heat Exchangers, Unit Heaters, Commercial and Industrial Equipment.