Propeller, Replacement, Propeller Dia. (In.) 12 in, Bore Dia. (In.) 1/2 in, Number of Blades 3, Pitch (Deg.) 40, Blade Material Aluminum, Keyway (In.) -, Rotation CW Facing Discharge, Required Motor HP -, Required HP @ Higher RPM 1/8 hp, Required HP @ Lower RPM 1/250 hp, RPM Low 1,140, RPM High 1,725, Max. RPM 1725, CFM @ 0.000-In. SP 1458/963, CFM @ 0.125-In. SP 1299/740, CFM @ 0.250-In. SP 1145/617, CFM @ 0.375-In. SP -, CFM @ 0.500-In. SP -, Blade Height (In.) 3 1/2 in