4 Blade, Interchangeable Hub, Condenser (Pressure) Type Fan BladeBlades: 4Rotation: ClockwiseDiameter: 18 InchesPitch: 33°0 Inches Static Pressure: CFM = 2950, BHP = 0.1730 Inches Static Pressure: CFM = 1870, BHP = 0.23Maximum RPM: 1725Typical Applications: Air-Conditioning Condensers, Power Roof Ventilators, Heat Pumps, Heat Exchangers, Unit Heaters, Industrial Equipment