Propeller, Replacement, Propeller Dia. (In.) 27 in, Bore Dia. (In.) 3/4 in, Number of Blades 6, Pitch (Deg.) 25, Blade Material Spark Resistant Cast Aluminum, Keyway (In.) 3/16, Number of Set Screws 1, Rotation CW Facing Discharge, Required Motor HP 11-1/22, Required HP @ Higher RPM 2 hp, Required HP @ Lower RPM 1 hp, RPM Low 1,400, RPM High 1,850, Max. RPM 1400/1650/1850, CFM @ 0.000-In. SP 7900/9315/10,440, CFM @ 0.125-In. SP -, CFM @ 0.250-In. SP -, CFM @ 0.375-In. SP -, CFM @ 0.500-In. SP -