Air Circulator and Exhaust Fan Aluminum Replacement Propellers No. of blades: 3 CW rotation facing discharge Embossed aluminum blades and spiders for strength and rigidity Hubs include set screws (hub on intake side) For low static pressure applicationsNote: Air deliveries based on standard test codes of AMCA. When used in system over 0.250" SP, increase motor HP to next larger size. Item: Propeller Type: Replacement Propeller Dia. (In.): 18 Bore Dia. (In.): 5/8 Number of Blades: 3 Pitch (Deg.): 26 Blade Material: Aluminum Rotation: CW Facing Discharge Required HP @ Higher RPM: 1/3 Required HP @ Lower RPM: 1/11 RPM Low: 1140 RPM High: 1725 Max. RPM: 1725 CFM @ 0.000-In. SP: 3408/2252 CFM @ 0.125-In. SP: 3180/1868 CFM @ 0.250-In. SP: 2916/1522 Blade Height (In.): 4-1/16 Blade Width (In.): 9-3/16 Remarks: View Catalog Page For Better Selection Criteria For Use With: Exhaust Fans and Circulators